There is an author email address in the plugin, you could try that, but same as Ofnuts you are unlikely to get a fix.
My advice is do not give up on Gimp 2.10 if possible , especially if you need a batch operation. Which linux are you using ? You might be able to use an alternative such as gmic_gimp_qt plugin, although you might have to compile that yourself.
As an example, a Gimp 3.0 RC1 appimage + plugin in a kubuntu 24.04 Not quite as vivid as the plugin but once set up easy to duplicate image-by-image.
My advice is do not give up on Gimp 2.10 if possible , especially if you need a batch operation. Which linux are you using ? You might be able to use an alternative such as gmic_gimp_qt plugin, although you might have to compile that yourself.
As an example, a Gimp 3.0 RC1 appimage + plugin in a kubuntu 24.04 Not quite as vivid as the plugin but once set up easy to duplicate image-by-image.