Home Assistant 2026.7: Config flow could not be loaded ("invalid handler specified")

[sneesh]

Environment

• Home Assistant: 2026.7.4
• HACS installation
• Danalock Cloud: v1.2.0

Problem

After installing the integration from HACS and adding it via Settings > Devices & Services, Home Assistant displays:

"Config flow could not be loaded: {"message":"invalid handler specified"}"

Cause

config_flow.py contains a syntax error:

from .const import (
...
EXPIRES IN,
...
)

This should be:

EXPIRES_IN,

There is also another issue later in config_flow.py:

auth_result.get(TOKEN_EXPIRES_IN)

should be:

auth_result.get(EXPIRES_IN)

since const.py defines:

EXPIRES_IN = "expires_in"

After correcting the import (and the constant reference), the integration loads and the config flow works correctly.