Yes it’s seems plugin is not working anymore since Krita 5.1
Just tested 5.0.6, plugin works as expected.
If you’re using the plugin 98% of time, I an only recommend you to go back to Krita 5.0.6 until a fix has been made.
I’ve to dig why it doesn’t work anymore, but from memory I already got a similar bug here:
I’ll try to check in the week if it’s the same problem or not
