No text message with Android TV

I am using the newest jami (2022-12 installation) with a Panasonic TV (LXW724). I can receive text messages, but I cannot send text messages. Is it correct to use the ok-button for sending the message? Nothing happens, when I press the ok-button.

BTW, adding an avatar from a file doesn’t work too, i cannot change into the Pictures-folder with the ok-button using the gallery alone, so I assume this is an android-problem. Android 11 is installed and everything is uptodate.