If the issue began immediately after a new patch, it's possible that you corrupted your game files by attempting to patch prior to server being ready for that.
It's also a possible that a node began having issues coincidentally after a patch was released.
Read this thread for more information regarding problematic nodes.
I would suggest preforming a full scan via the game launcher,
Ensure that EE is set as a firewall exception, restart your router, and as a last resort consider reinstalling EE.
Otherwise, the issue may not be on your end. You'll simply have to be patient.