Where is the link to download the addon?

Click the cloud icon:

Works in 2.83, but not in 2.93. Didn't try in-between versions.

Probably a really easy fix (error in line 90), but I don't know what changed in the Python API...

In 2.90 they switched to the new boolean (Fast/Exact solver).

the bpy.ops.object.modifier_apply no longer has the apply_as option. I only quickly tested, but if you remove that the script seems to work just fine in 2.90, 2.93.2, and 3.0.

change: bpy.ops.object.modifier_apply(apply_as='DATA', modifier="Boolean")

to: bpy.ops.object.modifier_apply(modifier="Boolean")

Thanks, sorry i zero coding knowledge. Can you plz update and save and send me the addon

Thank you so much  dillenbata3 !

dillenbata3 . Thanks it work for me.

https://imgur.com/a/VyYbrza