Same problem here, I live in the USA and “continue” stays grayed out on any zip code I enter, even non-local ones. I’ve tried multiple browsers, computers and networks and made sure that ad-blockers and do not track requests were turned off just in case these were interfering.
EDIT: Oh, I’m a dummy. There’s this convenient little banner at the top of every page on this forum right now:
DVR EPG Maintenance Outage - 22:00 UTC ( 3pm PDT) 17 October - 6:00 UTC 18 October 2019
Go here for more info: DVR EPG Maintenance. Would be nice if this was also displayed as a notification on the PMS dashboard… Would probably help Plex staff avoid the spontaneous generation of angry mobs.