8920 connection refused

[Venompool888]

I built my emby server on Synology7. It has been working good for almost two hundred days but recently I found 8920 can't be visited no matter it's in my local network or from Internet but Tcping is still avaliable. I disabled the firewall but the problem still lies. I can use 8096 to visit my emby but http connection is not safe.
I attempt to use different ports to reverse the connections on 8096 and 8920, but still received a connection refused result....

embyserver.txt

[LukePulverenti]

Hi, did you setup https in Emby Server network settings? You need to do this before you can use https.