So I created a server, Vanilla 1.14.4.
I gave my friend the admin rights of it too. Sharing it. We played a bit and went offline. Now (A couple weeks went by) we are trying to join the server but it doesnt work anymore for some reason.
It says: Failed to connect to the server
Failed to log in: Invalid session (Try restarting your game and the launcher)
Restarted it. Problem still there. We dont know what to do.
Does anybody have the solution to that or just some tips? Any help would be really appreciated.