Maintenance for the week of April 3:
• PC/Mac: No NA megaserver maintenance – April 3
• PC/Mac: EU megaserver for maintenance – April 3, 8:00PM EDT (April 4, 00:00 UTC) – April 4, 10:00AM EDT (14:00 UTC)
If you mean actual running and not sprinting, the only way out of this is to open the Crown Store. I was having the exact same thing just today several times (and until some months ago every now and then). Not sure what causes this..