Any update on this? I cannot push to TestFlight because of this

Any updates on this one? I'm having same issue with Instagram 167.0 and iOS 14.2. Workaround is that you wrap that url in UIImage and then it will work but UIActivityViewController won't behave right (it won't show preview of image).

I think that error is somehow produced by 2FA authentication failure.

My solution: step 1: Signin My Apple ID in Setting step 2: click AppleID -> Password & security -> Apps Using Your Apple ID -> Enter Two-factor authentication code step 3: Sign in Apple in my app work for me Hope this helps!" This also works, but from time to time you must repeat the process.