Debugging custom SyntaxHighlightings in textedit

Hi All,

I created a custom syntax highlighting for plain texteditor. The ace project has a generator that created these js files based on TextMate Languages.

I tested it with ACE.
Then transferred it to brace in the textedit project and built it.

It look all find and these custom extensions are opened by the editor.
Sadly without syntax highlighting

Is there a log or anything where i could dig for issues? Or can i try textedit somehow outside Nextcloud?

Kind regards