unbound variable: FG-IMAGE-FILL

[Krikor]

Hi,
I'm getting the following error:

Error: eval: unbound variable: FG-IMAGE-FILL

I believe it is due to an outdated command that should be changed.
But even consulting the Procedure Browser I don't know how to solve this problem.
   
I tried to replace gimp-edit-fill with gimp-drawable-edit-fill but it was more complicated than I thought and I ended up giving up.

Could someone help me with this?

///// Gimp 2.10.21 Samj's Portable - Win10 /////

Thx.