Can't load local web from a local DSP package

[betsu]

I very excited that DSP v1.2 add feature that is load local web from a local DSP package.
When I try to use that amazing feature, I can't realize in my DSP.

markdown code

file position

How can I fix the problem?

win10
vscode: v1.56.2
XD vscode extension: v1.2.3

[eddie-at-work]

Just wondering, what's the content of your btn.html look like?

[betsu]

Just wondering, what's the content of your btn.html look like?

It's very simple HTML code in btn.html.