game will not connect to regular played servers in history

this morning I tried to log onto my favourite played server in the history tab. I got this message

Facepunch_connector_AuthTimeout
SystemNullReferenceException:Object Reference not set to an instance of an object
( string of code)

What does this mean and why cannot I connect to my regular played server?

I have clicked other community servers… and I can connect. The two I had in history from last night Are giving me the same message… but new ones I tested this morning are working fine once they are added to favorites.

Anyone know what this issue is?

My group of 5 friends and I all have this issue with the server I rent now. The issue has gone ignored by the devs as far as I can tell, been doing a ton of research trying to fix it.