@Solla-topee 

Hi thank you for the reply.

Regarding your suggestions

1. is there a way to check how many devices are logged into the device at any one time?  In any case it is only the one linux server running agentdvr that is constantly connected.  the only other person with access to the account is my wife and I know she is not trying to view it at the same time.  It is not someone else because not sure why they would want to log into a camera that I have put in my roof cavity because it keeps coming up with this error - I am sure there are more interesting streams available to watch.

2. I reset the camera, it works for a few hours-days then the same problem comes back.

My suggestions for TP-Link would be

1. provide a portal to access the cameras from PC (ideally software based - not browser based)

2. if someone is trying to log onto a stream have the option for an admin password that allows you to kick other viewers from the stream or at the very least provide a log of the ip addresses that are accessing the stream

3. if you cant change point 2 then at least make it the oldest sign in gets kicked and the newest sign in is allowed access rather than preserving the old log in and rejecting the new login.