(SOLVED) - What am I missing? (syntax problem?)

Can you make a pic of your database? Live and preview (just first 3-5 rows of data and the HEADER).

Can you show a pic of your dataset-options?

And your last used code (full code which is actually used for the simple example to solve the problem).

EDIT: already tried to run your code in another BROWSER ? Internet-Explorer / Edge / FireFox / Opera / Brave or something like that ?