@dave_Kent 

Thank you for posting on TP-Link community. Can you provide a screenshot of this error message here?

Please check if you have login the same account on other devices that didn't log out? If your family members use the same account on other devices to watch the playback at the same time, it may reach the limit.

Each camera supports up to 2 simultaneous video streams. You could use up to 2 devices to live view the camera at the same time using the Tapo App or the RTSP. You could view the playback on only one device using the Tapo App at the same time. Check here to learn more information able Tapo camera. General Questions about the Tapo Camera

Please send your TP-Link ID, camera Mac address to me via private message, we will assist further. 

  @dave_Kent 

Thanks so much for sharing all the detailed info. To address the issue and try to fix it, we would like to have a specialist look into this further via email. Please check your mailbox later, and let us know if the issue is resolved. Thank you!

Hi  @Kermit1910 

A support ticket TKID221146371 has been created for you and it's followed by the specialist. Please check your inbox and reply to the email.