Maintenance Schedule:
[KST] 14:00 ~ 14:30 May 9th
[CEST] 07:00 ~ 07:30 May 9th
[PDT] 22:00 ~ 22:30 May 8th
The servers will be restarted to resolve a connection issue with the NA East server.
The maintenance is scheduled to take 30 minutes.
05.09 Temporary Maintenance
Source: Steam Community (opens in a new tab)