I too have this problem. It seems that if you go into your .thunderbird directory and delete the file addonStartup.json.lz4, thunderbird is able to start. Restarting tb usually causes the error to appearagain, but re-deleting this file allows it to start again.
I too have this problem. It seems that if you go into your .thunderbird directory and delete the file addonStartup. json.lz4, thunderbird is able to start. Restarting tb usually causes the error to appearagain, but re-deleting this file allows it to start again.