Cannot delete a message with no content
I have a downloaded message in Thunderbird that has no content and I can't delete. When I single click on the message nothing happens (I stay on the previously selected message). When I double click the message I get a blank screen.
There is therefore no way I can delete this message. Nor can I do anything else with it (reply, move, copy etc). I have tried closing and re-starting Thunderbird but the problem persists.
All other messages I can open and delete as normal
Help please! I am using Thunderbird version 128.5.2esr on a PC running Windows 10