Unable to Accept Invite

I'm getting an error after clicking on a TestFlight Beta version invite from email. The error says The Apple Account you're currently signed in with, ****@outlook.com, doesn't match the one associated to this invitation.

The invitation was sent to the email that I use to sign into my Apple account (it is my apple id) and I am signed into my iphone with that account.

What can I do to get the invite to match up and go through with TestFlight?

I have exact same problem... invite is sent to same email I log into Apple with, but it throws the error you state. Zero help so far trying to find a solution.

Unable to Accept Invite
 
 
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