Are you using Apparmor ? If so the Thunderbird profile may be interfering with revocation cert creation. This thread here may have info that can help if that is the problem.
How create key manually ? and in which directory key should be saved
This question can be answered as per the “Free Support Principle”. Since creatng a GPG key is not Whonix specific, and is well documented, using your search engine should return desired results using keywords…
How do I create a GPG revocation certificate in ( Linux, Debian …etc etc )?
Using same instructions and I get this error.
I use Whonix 14. It seems it’s easy to fix it, but you need to know Linux.
It’s need to change something in config cause GUI is updated now and don’t have option Use gpg-agent for passphrases
Seems I will be forced to move to Claws Mail, but I think there I can get same error.
this appears to have fixed a number of anomalies involving gpg/engimal for thunderbird in whonix 14 for me so far, including the problem you experienced.