Hi 

My problem is the live feed and playback feed is not loading when i access the NVR web interface. I get the error Ch1:Load Failed. The feed shows correctly in the HDMI output of the NVR. I believe this error is because of the Untrusted Certificate error. Tplink has provided a solution for this at How to Configure HTTPS Certificate to Avoid Untrusted Certificate Error in VIGI NVR & IPC | TP-Link Portugal

However this requires me to access a setting in the NVR web interface Settings > System > System Management > Certificate Management tab,
 

But this tab does not exist in my screen. The only tabs i see in Settings > System > System Management are "System Management", "System Maintenance", "Diagnostic Tools"

So how do i enable this Certificate Management Tab ?