No script URL provided. Make sure the packager is running or you have embedded a JS bundle in your application bundle.

Description

i upgrade my react native app from 0.76.6 to 0.77.0. The build has successfully but i have the following error

unsanitizedScriptURLString = (null)

Steps to reproduce

i applied all the step mention
https://react-native-community.github.io/upgrade-helper/?from=0.76.6&to=0.77.0&package=com.idp.com&name=IDPMobile

npm install
cd ios
pod deintegrate pod install --repo-update
cd ios && xcodebuild clean
npx react-native run-ios

React Native Version

0.77.0

Affected Platforms

Runtime - iOS

Output of `npx react-native info`

System:
  OS: macOS 14.5
  CPU: (8) arm64 Apple M1
  Memory: 111.05 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.18.1
    path: ~/.nvm/versions/node/v20.18.1/bin/node
  Yarn: Not Found
  npm:
    version: 10.9.2
    path: ~/Documents/AccuV-Team/IDP.Mobile/node_modules/.bin/npm
  Watchman:
    version: 2024.01.22.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.15.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.4
      - iOS 17.4
      - macOS 14.4
      - tvOS 17.4
      - visionOS 1.1
      - watchOS 10.4
  Android SDK:
    API Levels:
      - "28"
      - "29"
      - "31"
      - "33"
      - "34"
      - "35"
    Build Tools:
      - 29.0.2
      - 30.0.2
      - 30.0.3
      - 31.0.0
      - 33.0.0
      - 33.0.2
      - 33.0.3
      - 34.0.0
      - 35.0.0
    System Images:
      - android-31 | Google APIs ARM 64 v8a
      - android-33 | Google APIs ARM 64 v8a
      - android-34 | Google APIs ARM 64 v8a
      - android-34 | Google Play ARM 64 v8a
      - android-35 | Google APIs ARM 64 v8a
      - android-35 | Google Play ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: 2024.2 AI-242.23339.11.2421.12700392
  Xcode:
    version: 15.3/15E204a
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.11
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 15.0.1
    wanted: 15.0.1
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.77.0
    wanted: ^0.77.0
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Stacktrace or Logs

No script URL provided. Make sure the packager is running or you have embedded a JS bundle in your application bundle.

unsanitizedScriptURLString = (null)

Reproducer

https://github.com/TonyFTannous-Byd/repo

open the terminal and run the following:

1- npm run start:clean
2- npm run android:local (it work no problem)
3- npm run ios:local (ios platform did not work, and i have the error in the Screenshots bellow)
...

Screenshots and Videos

@OTitaev

You are a hero @OTitaev!

@OTitaev

good job @OTitaev 👍

@OTitaev

@OTitaev
our Cocoapods scripts should inject that flag for you: https://github.com/facebook/react-native/blob/main/packages/react-native/scripts/react_native_pods.rb#L422

the react_native_post_install function called in your post_install hook as shown here: https://github.com/react-native-community/template/blob/main/template/ios/Podfile#L28-L33

why SWIFT_ACTIVE_COMPILATION_CONDITIONS not injected????

#49245 (comment)
Try this and I hope it can help you.

Facing same problem

I am also facing same issue,

I'm also facing same issue

Guys, the problem is in DEBUG flag in AppDelegate.swift

override func bundleURL() -> URL? {
#if DEBUG
    RCTBundleURLProvider.sharedSettings().jsBundleURL(forBundleRoot: "index")
#else
    Bundle.main.url(forResource: "main", withExtension: "jsbundle")
#endif
  }

You should add SWIFT_ACTIVE_COMPILATION_CONDITIONS = "$(inherited) DEBUG";

Inside project.pbxproj in debug XCBuildConfiguration block

Should look like this

83CBBA201A601CBA00E9B192 /* Debug */ = {
			isa = XCBuildConfiguration;
			buildSettings = {
				ALWAYS_SEARCH_USER_PATHS = NO;
				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
				CLANG_CXX_LANGUAGE_STANDARD = "c++20";
				CLANG_CXX_LIBRARY = "libc++";
				CLANG_ENABLE_MODULES = YES;
				CLANG_ENABLE_OBJC_ARC = YES;
				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
				CLANG_WARN_BOOL_CONVERSION = YES;
				CLANG_WARN_COMMA = YES;
				CLANG_WARN_CONSTANT_CONVERSION = YES;
				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
				CLANG_WARN_EMPTY_BODY = YES;
				CLANG_WARN_ENUM_CONVERSION = YES;
				CLANG_WARN_INFINITE_RECURSION = YES;
				CLANG_WARN_INT_CONVERSION = YES;
				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
				CLANG_WARN_STRICT_PROTOTYPES = YES;
				CLANG_WARN_SUSPICIOUS_MOVE = YES;
				CLANG_WARN_UNREACHABLE_CODE = YES;
				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
				COPY_PHASE_STRIP = NO;
				ENABLE_STRICT_OBJC_MSGSEND = YES;
				ENABLE_TESTABILITY = YES;
				"EXCLUDED_ARCHS[sdk=iphonesimulator*]" = "";
				GCC_C_LANGUAGE_STANDARD = gnu99;
				GCC_DYNAMIC_NO_PIC = NO;
				GCC_NO_COMMON_BLOCKS = YES;
				GCC_OPTIMIZATION_LEVEL = 0;
				GCC_PREPROCESSOR_DEFINITIONS = (
					"DEBUG=1",
					"$(inherited)",
				);
				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
				GCC_WARN_UNDECLARED_SELECTOR = YES;
				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
				GCC_WARN_UNUSED_FUNCTION = YES;
				GCC_WARN_UNUSED_VARIABLE = YES;
				IPHONEOS_DEPLOYMENT_TARGET = 15.1;
				LD_RUNPATH_SEARCH_PATHS = (
					/usr/lib/swift,
					"$(inherited)",
				);
				LIBRARY_SEARCH_PATHS = (
					"\"$(SDKROOT)/usr/lib/swift\"",
					"\"$(TOOLCHAIN_DIR)/usr/lib/swift/$(PLATFORM_NAME)\"",
					"\"$(inherited)\"",
				);
				MTL_ENABLE_DEBUG_INFO = YES;
				ONLY_ACTIVE_ARCH = YES;
				OTHER_CPLUSPLUSFLAGS = (
					"$(OTHER_CFLAGS)",
					"-DFOLLY_NO_CONFIG",
					"-DFOLLY_MOBILE=1",
					"-DFOLLY_USE_LIBCPP=1",
					"-DFOLLY_CFG_NO_COROUTINES=1",
					"-DFOLLY_HAVE_CLOCK_GETTIME=1",
				);
				OTHER_LDFLAGS = (
					"$(inherited)",
					" ",
				);
				REACT_NATIVE_PATH = "${PODS_ROOT}/../../node_modules/react-native";
				SDKROOT = iphoneos;
				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "$(inherited) DEBUG";
				USE_HERMES = true;
			};
			name = Debug;
		};

I tried this but
SWIFT_ACTIVE_COMPILATION_CONDITIONS = "$(inherited) DEBUG"; is already inside my project.pbxproj..

SWIFT_ACTIVE_COMPILATION_CONDITIONS is not being set for the main project. It's being set for pods project. You'll also need to add it for the main project:

	SWIFT_ACTIVE_COMPILATION_CONDITIONS = "$(inherited) DEBUG";

For me the problem was solved, when I had both (computer and iPhone) in the same WIFI. Only connected with a cable didn't work, but within the same WIFI worked.

Check your network proxy settings, you will get this error when the following three conditions are met at the same time

You are using the iOS simulator
You have enabled the network proxy in the Mac OS System Settings
The network proxy server is not on the same device as the Metro Dev Server

This causes the request from your react native APP to http://localhost:8081 not be forwarded to the Metro Dev Server by the proxy server.

The simplest solution
~~Turn off the network proxy in Mac OS System Settings, completely exit your react native APP and reopen it~~
add localhost to Bypass proxy settings for these hosts & domains:

I had the same problem, and I already had the SWIFT_ACTIVE_COMPILATION_CONDITIONS flag set. Here's what helped me:

Remove Pods

Remove node_modules

Do a fresh install

After installing the app, go to Settings and enable Local Network access

I had the same problem, and I already had the SWIFT_ACTIVE_COMPILATION_CONDITIONS flag set. Here's what helped me:

Remove Pods

Remove node_modules

Do a fresh install

After installing the app, go to Settings and enable Local Network access

Fresh install of all the node modules and pod?
ANd where in the settings are we going to enable Local Network access?

if u facing this issue , and tries everything then tried it once

Uncheck the "For install builds only" option in Bundle React Native code and images phase.

This will ensure the script runs on every build (including debug builds from Xcode).

if u have that doubt Why U uncheck It read below

When running the app from Xcode to a real device:

By default, Metro runs at localhost:8081 on your Mac, but the device cannot resolve localhost to your Mac IP.

Additionally, in Xcode Build Phases → "Bundle React Native code and images", the option "For install builds only" is often checked by default.

This causes the bundling script to only run for install builds, not for normal debug builds.

Resulting in the device trying to connect to Metro but failing because the app doesn't know the correct Metro server IP.

Do one thing
If you are building the app via XCode leave that and build it using terminal
like for example do yarn ios --device(if you are using yarn) , you can select your iphone there
It will make a new build and hopefully it'll run

Also you can check if your metro was running earlier. Close that and build again.

Delete the node modules and pods then reinstall it.

Works for me.

build(expo): upgrade expo sdk to version 53

My problem was that I had scheme names other than DEBUG. What I needed to do was to Add -DDEBUG to all my Debug-Like Schemes. Steps:

Open Xcode → Project Navigator → Select your app target
Go to Build Settings

Filter by: Other Swift Flags
Or navigate to:
Swift Compiler – Custom Flags > Other Swift Flags

Add -DDEBUG to all relevant configurations
For example:

Configuration	Flags
devDebug	-DDEBUG ✅
prodDebug	-DDEBUG ✅
stagDebug	-DDEBUG ✅
devRelease	(leave empty) ❌
prodRelease	(leave empty) ❌
stagRelease	(leave empty) ❌

You only need -DDEBUG for the debug builds — never add it to Release.

✅ After Adding:

Product > Clean Build Folder
Restart Metro:
npx react-native start --reset-cache

For me the issue was simply that the testing device and the developer mac were on restricted networks (the need to be able to talk to each other via the network). I set up a hotspot for both devices (Dev Mac & test iPhone) and now it works.

It's so easy ,
First method , xcode config Allow access to the local network
Second method , iphone open settings to set app permission for allow access to local network

getsentry/sentry-react-native#5168

Steps to Reproduce
upgrade react native to latest 0.81.4
and add new scripts like Sentry DOC

`set -e
WITH_ENVIRONMENT="../node_modules/react-native/scripts/xcode/with-environment.sh"
REACT_NATIVE_XCODE="../node_modules/react-native/scripts/react-native-xcode.sh"
SENTRY_XCODE="../node_modules/@sentry/react-native/scripts/sentry-xcode.sh"
BUNDLE_REACT_NATIVE="/bin/sh $SENTRY_XCODE $REACT_NATIVE_XCODE"

Expected Result
when run on real device this should work normal like simulator but i faced this error

No script URL provided. Make sure the packager is running or you have embedded a JS bundle in your application bundle. unsanitizedScriptURLString = (null)

in case i revert the script every thing work good without sentry

Actual Result
No script URL provided. Make sure the packager is running or you have embedded a JS bundle in your application bundle. unsanitizedScriptURLString = (null)

If a local server (e.g., Express or Fastify) is started on the same port as Expo (8081), this error will occur. In my case, the issue was resolved by stopping the local server or configuring it to use a different port.

I did prev steps SWIFT_ACTIVE_COMPILATION_CONDITIONS = "$(inherited) DEBUG"; then deleted ios,android,expo, node-modules folders then do npm install, npx expo prebuild --clean and npx expo run:ios --device but still see issue, then I changed my backend base url in .env file from http://localhost:8080 to http://172.16.13.4:8080 (you can get your own with ipconfig getifaddr en0) and it is worked for me

npm install --> npx expo run:ios

worked for me.

Fix build

feat: upgrade react-native@0.77.3 (#83)

Add this to AppDelegate.swift before startReactNative

    #if DEBUG
      RCTBundleURLProvider.sharedSettings().jsLocation = "192.168.1.20:8081" // IP of your computer
    #endif

Why is this closed, still seems to be an issue for many people and none of the above answers have worked for me.

@TonyFTannous-Byd

Hitting this on RN 0.83.4 + New Architecture + Expo 55 + Objective-C AppDelegate. Both simulator and physical device affected.

Diagnosis

Added logging inside bundleURL to trace the resolution chain:

- (NSURL *)bundleURL {
#if DEBUG
  BOOL isRunning = [RCTBundleURLProvider isPackagerRunning:@"localhost"];
  NSString *hostPort = [[RCTBundleURLProvider sharedSettings] packagerServerHostPort];
  NSURL *url = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index"];
  NSLog(@"isPackagerRunning=%@ hostPort='%@' url=%@",
        isRunning ? @"YES" : @"NO", hostPort ?: @"nil", url ?: @"nil");
  return url;
#else
  ...
#endif
}

Result:

isPackagerRunning=YES hostPort='nil' url=nil

Metro is reachable at localhost:8081 (200 OK), isPackagerRunning(localhost) returns YES, but packagerServerHostPort returns nil. This means guessPackagerHost inside packagerServerHostPort returns nil despite its individual pieces working correctly.

After calling setJsLocation:@"localhost" explicitly, packagerServerHostPort returns "localhost" and bundleURL returns a valid URL.

Workaround

Two things were needed together:

1. Add SWIFT_ACTIVE_COMPILATION_CONDITIONS = "$(inherited) DEBUG" to the app target's Debug build config (as @TonyFTannous-Byd suggested — it was set project-level but missing on the target itself)

2. Pre-set jsLocation before startReactNative in AppDelegate:

#if DEBUG
{
  NSString *ipPath = [[NSBundle mainBundle] pathForResource:@"ip" ofType:@"txt"];
  NSString *ip = [[NSString stringWithContentsOfFile:ipPath encoding:NSUTF8StringEncoding error:nil]
                  stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
  // Use ip.txt LAN IP for device builds, localhost for simulator/cloud-built dev clients
  BOOL isLanIp = [ip hasPrefix:@"192.168."] || [ip hasPrefix:@"10."];
  NSString *host = (ip.length > 0 && isLanIp) ? ip : @"localhost";
  [[RCTBundleURLProvider sharedSettings] setJsLocation:host];
}
#endif

For us, the SWIFT flag alone wasn't sufficient — possibly because we have an Objective-C AppDelegate (not Swift). The setJsLocation bypass ensures packagerServerHostPort takes the jsLocation path and never hits the broken guessPackagerHost branch.

Also required for physical devices: runOnlyForDeploymentPostprocessing = 0 on the "Bundle React Native code and images" build phase so ip.txt is generated in Debug builds (was set to 1, meaning it only ran during Archive).

Environment

RN 0.83.4
Expo SDK 55
New Architecture enabled (RCT_NEW_ARCH_ENABLED=1)
Objective-C AppDelegate (inherited from older RN versions)
Xcode 16+

First, run "yarn start", and then run "yarn ios".

Navigation Menu

Repository navigation

No script URL provided. Make sure the packager is running or you have embedded a JS bundle in your application bundle. #49173

Description

Steps to reproduce

React Native Version

Affected Platforms

Output of `npx react-native info`

Stacktrace or Logs

Reproducer

Screenshots and Videos

if u facing this issue , and tries everything then tried it once

if u have that doubt Why U uncheck It read below

Diagnosis

Workaround

Environment

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

No script URL provided. Make sure the packager is running or you have embedded a JS bundle in your application bundle. #49173

Description

Description

Steps to reproduce

React Native Version

Affected Platforms

Output of npx react-native info

Stacktrace or Logs

Reproducer

Screenshots and Videos

Activity

jeroenburgers commented on Feb 17, 2025

TonyFTannous-Byd commented on Feb 17, 2025

TonyFTannous-Byd commented on Feb 21, 2025

wuduwawawei commented on Feb 27, 2025

ouyangzhigang commented on Apr 2, 2025

ashishAmz commented on Apr 3, 2025

rym903 commented on Apr 4, 2025

rym903 commented on Apr 4, 2025

matinzd commented on Apr 16, 2025

jsSteud commented on Apr 17, 2025

gfgafn commented on Apr 22, 2025

redbluenat commented on Apr 23, 2025

daraxdray commented on May 13, 2025

ascebiswajit commented on May 14, 2025

if u facing this issue , and tries everything then tried it once

if u have that doubt Why U uncheck It read below

Imran0511 commented on Jun 2, 2025

Chwajid007 commented on Jun 23, 2025

genesisbell commented on Jul 24, 2025

sandy-garrido commented on Aug 27, 2025

Super1Windcloud commented on Sep 14, 2025

ShadyElsharnoby commented on Sep 15, 2025

ShadyElsharnoby commented on Sep 15, 2025

antinucleus commented on Sep 17, 2025

Donybro commented on Sep 24, 2025

UlasRenasOrdu commented on Oct 15, 2025

justsomeofl commented on Jan 25, 2026

ericTrayt commented on Apr 15, 2026

joartola commented on Apr 21, 2026

Diagnosis

Workaround

Environment

wubaibin commented on Sep 9, 2026

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions

Output of `npx react-native info`