js: Uncaught SyntaxError: Unexpected token '{'

[cheesecakejohnsonturbo]

Hi, all QT browsers I tried all gives the same error when accessing a Localhost WebUI
js: Uncaught SyntaxError: Unexpected token '{'
I wonder if it is caused by the fact that java is used inside the webUI?
My goal is to make a borderless, navigationless, venv web browser for WebUIs to launch separately from installed web browsers (for all sorts of conveniences: Preventing to lose page and work by navigation key binds... Preventing losing tabs)...
With a bit of work, it could multi-tab WebUIs easily and preserve the pages as-is from launch to launch in order to prevent the loss of unsaved work.