This is a new one I suppose for Gmail… ughhhhh

Contacts temporarily unavailable

Your contact list is temporarily unavailable, which may result in a few issues:

Auto-complete may not work

The contact manager may not load

Chat may not work

We’re working to fix the problem, and in the meantime, you should be able to continue to read and send mail as normal. Thank you for your patience.

via Contacts temporarily unavailable – Gmail Help.