Server Version#: 1.28.2.6151 Mac
Player Version#: 1.53.1.3225-c0bc6cc4 Mac and Web
Tuner Make/Model: HDHR Duo and Quatro
Guide/Lineup name: Local Broadcast Listings
Using XMLTV?: No
Channel number/Name: 5 WLWT
Either via the Plex app or via Plex on the Web, when I click the record button to record something in the future from the Guide, I get this error.

If I try to view/edit an already scheduled recording, I am now presented with this error message.

I deleted both of the HDHRs and recreated them but am still getting the same results. Unfortunately I cannot delete the scheduled recordings as it gives me this error instead. The scheduled recordings DO continue to record on their schedule, but I am unable to add/delete/modify anything pertaining to Live TV.
Edit: I am able to watch live TV in real time, but not able to future schedule.
Suggestions, I could sure use some. TIA.