Gnome tweak tool is reporting an error that the extension to choose your GNOME shell theme is not enabled, although it is.
Is there any way to manually override it, other than through the tool itself?
I found a solution here using dconf, and it works great, tested it myself
using dconf navigate to:
field to the directory of the theme :-). It doesn't have to be an absolute path, just the name of the directory in the ~./themes folder