Active Master Tier: Cannot view players character sheets, cannot view campaigns on app, dndbeyond says characters slots are full

I have an active Master Tier.

On Desktop.
Clicking 'view' on any of my players character sheets redirects me to 'My Characters' where it says "Character Slots Exceeded

Your current D&D Beyond Membership is: MASTER ( slots). To continue, select up to unlimited characters to activate. Your other characters will be deactivated until you restore them by deleting an active character to free up a slot, or by adding more slots with a D&D Beyond Subscription".

My library seems fine. 

Clearing cookies and cache did nothing. Disabling adblocker did nothing. Signing in and out did nothing. 

If I go to the app.
Instead it says "We could not fetch your latest changes" with a refresh symbol next to it. This does nothing.

There's a red spinning wheel bottom right. I can see my characters (15/6). But 'Campaigns' just gives me '"We could not load your campaigns" with a refresh button that does nothing. Same for 'Listings' and 'Library'. 

So something very weird is up with my account across devices it seems. Two games have been impacted by this while I'm paying money to make my games easier and more enjoyable. 
Please help

Contact support. Whatever's going on, we're unlikely to be able to fix it.