I have checked all my keybinds for recording to playtv and although it is set for manual recording it just does not start when I try to record. I have tried several games and it just does not work. I tried a few different keybinds but none work on any game.
Do you know if Automatic Recording is working? It might tell whether the issue is with the keybind, or if it's the ability to record.
However, create a support ticket about your issue with logs attached to so we can investigate further.
To send logs you just right-click on the Plays.tv taskbar icon, select Help > Feedback, fill out the info and make sure the checkbox is selected. Post back here to let me know you have sent it.