Outbound Call Option Greyed Out

[Allisonmc]

Three of my agents this evening could no longer make outbound calls in Contact Center.  The option in the lower left is greyed out.  One agent reported a message that " (user) is not in the queues with outbound settings available".  The users are in a queue with outbound call settings so I'm confused.

Our office hours ended at 5pm but that's never been an issue with making outbound calls before.