Unable to decrypt message

Capture d'écran 2023-11-29 111657

Hello, as someone has written me a message I systematically receive this error

Your myTS account does not have the key stored to encrypt the message.
If its a direct chat, then @tatayer must come online and his client will share the key with you. This happens automatically then.

If this is a group chat, then anybody who got the key will send it to you.