02-13-2022, 10:16 AM
Quote:...in my Gimp version 2.10.28 for Windows XP (x64)
I suspect that you do not have Windows XP, more probably Windows 10.
Unfortunately, parts of the Beautify plugin do not work with Windows 10 "Effects" is one part. It is a really old plugin, not going to get updated. Try up-to-date alternatives such as the Gimp gmic plugin http://www.gmic.eu