Did you try to re-add the Plugs today? The problem was logged as fixed at 1:33 AM (PT) this morning, so if this is experience from yesterday, please try again.
Also, V1 Plugs did have some issues to watch out for during setup. Please make sure none of these items are interfering with your efforts:
Since so many who had Plugs offline are now fixed, you may also want to contact Support at 206 339-9646 for assistance.