New Teams:

Hello everyone, I recently migrated some users over from one tenant to another. A couple of my users who are both using the new Teams are having problems accessing an external channel they were re-invited to (Guest) I asked them to request the new account be added to the guest channel. \- The original (old) Teams accounts still work and they can access the server in question. \- The new account displays the blow message when attempting to switch to that guest account. **"Oops!** **We have run into issues while switching to the selected account or org."** \-I have tried clearing cache with no luck. \-Logged the old account out. \-I tried through the web portal and I get the Invite message and when I continue, I get the same issue. It is like it is stuck in a loop. \-Changed Office Premium license to E3 with no luck. Both have Teams Premium licenses listed as active in licensing within o365 Suggestions?