Two other observations:
1. A few seconds elapses between opening the Key Management window and getting the error message. During this time mozilla-thunderbird-bin uses 100% CPU. 2. If I create a new user account on the same machine, it all works OK.
Two other observations:
1. A few seconds elapses between opening the Key Management window and getting the error message. During this time mozilla- thunderbird- bin uses 100% CPU.
2. If I create a new user account on the same machine, it all works OK.