I created a new profile (mozilla-thunderbird -P) and set it up with a different POP3 email account. I was able to send and receive plain text and encrypted email, but the Key Management window brought up the same error as before.
I created a new profile (mozilla- thunderbird -P) and set it up with a different POP3 email account. I was able to send and receive plain text and encrypted email, but the Key Management window brought up the same error as before.