Error on Testing Compiled User Interface

Hi, I’m a beginner on ChirpStack and I’m trying to test the compiled user interface from Github https://github.com/brocaar/chirpstack-application-server on my machine. Unfortunately, every time appears this error message when I call the application:

I’ve seen there was an update almost 2 months ago to fix this error, but my static files are already updated and the compilation runs well.

Any help would be appreciated!