Queue Chapters button is fine in old but grey now

[Selur]

But the Queue Chapters button is grey for clicking.

There is no such button (switching Icon/Text, there is):

I assume you mean the 'Import chapters from video input'-button.
This button is grayed out, when 'Import chapter on input change' is enabled.
When 'Import chapter on input change' is enabled, loading a source will tell Hybrid to automatically load the chapters from the source and queue them.
Loading your source, the chapters do get automatically loaded without an issue here.

=> can't reproduce the issue here.

Try whether resetting the defaults and reload, check and save and profiles&co you might load.

Cu Selur