We are aware of reports of Epic Client users receiving a "Connection Timeout" Error when attempting to join since the update.This does not appear to be affecting Steam Client users.
A network setting was removed during the update. We are investigating the situation and working closely with Wildcard for a solution. We appreciate your patience and understanding.
Please use this thread for all reports and updates from yourselves.
Edit: If any Steam users are finding they're unable to connect to a Steam enabled Ark Server, please let us know here.
We've received a fix from Wildcard and are deploying it across all servers as I write this. Please let us know if you're still experiencing issues in ~1-2hours.
The Hotfix: 312.13 - Official ARK: Survival Evolved Wiki