Please talk to the developer by creating an issue with their repo - you can find the address in the PKGBUILD.
If using the AUR package comment in the section of the PKGBUILD but remember that PKGBUILD on AUR - while it usually work - it is created for Archlinux not Manjaro and as such may have a dependency or configuration you have to solve manually.
Hello! That looks too complicated , but you ended up giving me the “solution”. I uninstalled the flatpak version (through terminal because looks like the Manjaro Package Manager didn’t removed the program properly) and installed throught terminal (sudo pacman -S gwe) and now it worked. I launched GreenWithEnvy through terminal too because I can’t find in the GNOME applications though. Thanks