Time to update your script-fu...

[PixLab]

any third-party plugins that call

Code:

script-fu-copy-visible

will not work in Gimp 3, unless they are changed to call

Code:

gimp-edit-copy-visible

instead.

https://gitlab.gnome.org/GNOME/gimp/-/issues/9868

[ofnuts]

There are plenty of things that won't work the same in Gimp3...

[MareroQ]

You probably know it well that in Gimp 3.0 only 17 of the old procedures will not change (out of 208 listed).
https://gitlab.gnome.org/GNOME/gimp/-/b ... nctions.md
The replacement is not necessarily a direct search-and-replace equivalent. Some may have different parameters.
Some examples:
https://samjcreations.blogspot.com/2022 ... pt-fu.html

[PixLab]

You might need to follow this guy https://gitlab.gnome.org/bootchk on the GIMP issues/gnome website, to be kept updated
It's him who posted and continue to post thing that will change in script fu, like those:

https://gitlab.gnome.org/GNOME/gimp/-/issues/9876
https://gitlab.gnome.org/GNOME/gimp/-/issues/9867

and so on...