Workaround: add to the ~/.config/mimeapps.list file
[Added Associations] x-scheme-handler/mid=thunderbird.desktop;
[Default Applications] x-scheme-handler/mid=thunderbird.desktop;
Workaround: add to the ~/.config/ mimeapps. list file
[Added Associations] handler/ mid=thunderbird .desktop;
x-scheme-
[Default Applications] handler/ mid=thunderbird .desktop;
x-scheme-