I'm using NVR DS-7716NI-M4 / 16P and Hik-Connect was working fine, then I decided to upgrade the firmware to latest version (DS-7716NI-M4/16P and then everything stopped working with Hik-Connect. I've now put the NVR back to version (V4.61.410 build 221123) that was working before but now Hik-Connect still cannot connect to the end server. I tried many servers and the only pingable one is litedev.sgp.hik-connect.com but it still cannot connect. I can see other people have experience similar behaviour but can't find any resolution, any help would be appreciated as currently I cannot access the cameras remotely.