@geeb-noob 

Hi, please note if this problem occurs after the EAP restart, because The system time set manually and  system time synchronized with PC’s clock settings wil be lost after the EAP is rebooted.

As for the NTP method, you may make sure that it is reachable by the EAP. Or you can simply find the NTP server on the internet and get its IP address.

If you use an NTP server on the internet, make sure that the gateway address is set correctly on the EAP. Otherwise, the EAP cannot get the system time from the NTP server successfully.