I am going to start with a new PoE+ switch and if that doesn't work I will upgrade my hybrid DVR to an NVR. My hybrid DVR and switch are over 10 years old. The switch has taken a tumble a couple of times and the DVR replaced a hybrid DVR that died. Should probably just buy an NVR to give the PTZ cameras better bandwidth and the PoE switch for better power.
On the other problem of "configuration login error-20" the solution in web interface was: Setting, System, Safety, Sytem Service, and choosing "Compatibility Mode" That got me to this error "The login return time is up." which I'm thinking is related to faulty equipment.