Issue With Joining Server

My server was working perfectly fine for the last three days or so ever since I started, but it suddenly timed out yesterday and I thought a quick refresh would bring it back online. However, after I restarted it, the player amount was changed from '0/10' to '???' and when I tried joining it would leave me on the 'Encrypting' page before directing me back to Timed Out. The same thing happened to my friends when they tried to join. I've never encountered this before, and I sent out a support ticket yesterday but received no answer yet, so if it's possible to tell me how to fix this problem it would be very much appreciated. Thanks (Note: I tried reinstalling the server and using backups instead but none of those work)

This is all I got in logs next to the Server loading properties.

Alright I pasted the full log into the server and saved it. Also no I do not have any plugins on my server, I tried reinstalling my world and using the backup/download but it only resulted in the same issue.