JetBrains: There are many errors on the JS console when running in the IDE

Created by: vdavid

To reproduce, just open the popup and do a search. Open localhost:9222 to see the problems.

Some more info:

1. Some of the errors come with an error code 0. We send no responses with the error code 0, so something is off here.

2. The Java side doesn't seem to be able to recognize the action indicateFinishedLoading, despite the case block that matches it.