Authorization Popup in Thunderbird is not displayed

[agairing]

The following is happening on my system:

• open and unlock keepass
• open thunderbird
• keepass display the popup that a connection needs authorization and displays the code
• thunderbird does not display any popup to enter this code

This happens with keebird 2.0.1. Then I did reinstall keebird - now the version is 2.0.0. But it did not work with either version. Thunderbird 68.3.1 (32 bit/Windows)