@Solla-topee I have the same issue, black screen after reboot, time running normally, Camera C200 Firmware 1.1.11 build 210625 Release 56514n(4555); Phone IOS 12.5.4 can you help me? please?

@Solla-topee My Router is an Huawei EchoLife HG8145V5 GPON Terminal

@Valdenebro the solution for my case was setting the router firewall at a medium security level, not the highest one that blocked TP-Link NTP server.