Rated 2 out of 5 stars

I'm afraid to report an issue I just found on Thunderbird 78.3.3/78.4.0 + Check and Send 2.0.13.
"Send" and "Cancel" buttons don't appear on the dialog.
Compose a mail, press send button, Check and Send dialog comes up, press Cancel button, press check button to reopen the dialog and neither "Send" nor "Cancel" button is shown.

This review is for a previous version of the add-on (2.0.13).