Does OCR need enabling? -> not working

Hello

I have SiYuan installed on several devices (Windows, Android, Docker), but OCR does not seem to work with any of the installations. The field that is supposed to show the OCR output remains always empty - tested with an image that shows super clear text.

Do I need to enable OCR somewhere in the settings, install additional stuff, etc.? Did not find anything in the docs, forums etc.

Thanks a lot!

Using VIP lifetime btw.