I have a 9632 4k nvr with firmware 4.82. I have installed this about 1 year. couple week ago. I got a don't see any camera. so I look at the configuration in the nvr. it shown "the user is locked" on all camera. I try reboot everything. or even changed the password and took out illegal login. still don't work. I change all the ip of the cameras. and they all work for a day. next time. some cameras show password or user error. something like that. Thank you for any input.