I had two pictures on my iPhone that I needed to get onto my iPad.
I typically use iMessages when going between devices. Sometimes I just create a draft message in gmail and add the pictures as an attchment- I shouldn’t need to resort to this though.
I sent each picture in a separate msgs from the phone to the same phone number that is registered for my iCloud account. The pictures never showed up on my iPad. I rebooted the iPad and waited a while, still no pictures in iMessages. Then I signed out of my iCloud on my iPad. When I signed back in I was prompted for the passcode and entered it.
Then “an error occurred trying to save the iCloud account” was displayed”. I clicked OK, then was prompted again to enter the passcode. Now the passcode dialog is stuck on the screen. This happened to me the last time I logged out & into iCloud on the iPad.
Both the phone and iPad have the most recent version of iOS and are logged into the same iCloud account. I’m not sure what to try next.
From your description I would think this has nothing to do with iMessage (though it demonstrates itself that way)
I think this is related to your iCloud account on the iPad having issues with either iCloud authorization or the iCloud keychain. (Is iCloud keychain enabled on the iPad?)
If the dialog stays on screen all the time I would consider doing a nuke&pave on the iPad.
(DFU restore maybe?)
To verify: if you look at iMessage on a Mac (if you have one) does the iMessage show up there?
I think you’re on to something. Under Share Name and Photo on the iPad, it shows off. When I tap that option, a dialogue is displayed. On the “Hi it’s me” screen, it is toggling between my name and the email address that is registered with my Apple ID.
A while ago, I created a Memoji for my Apple ID icon- on my iPhone. The picture that shows up in Contacts of my friends