Action button does nothing

I’m running a self-hosted instance of Grist, and I’ve encountered an issue where the action buttons don’t seem to trigger any scripts or actions. I’ve checked the button configuration and associated scripts, but nothing happens when I click the button. The same setup works fine on the cloud example.

Grist Version: Version 1.1.15

I’ve tried different versions of Grist
(1.1.14, 1.1.15, 1.1.17)
The same result - nothing happens

OK. My bad, I missed an obvious mistake - I tried to write in the column named “Body” instead of “B”.
Unfortunately, the Action Button widget didn’t show anything in that case.