Microsoft Solitaire Collection - Cannot Login

I have been playing the Microsoft Solitaire Collection for years. I logged out of the game on Monday and cannot log back in. I have called Microsoft to discuss error code 11700000 Xbox Live cannot login. They were no help and have stated its a problem with my iPhone. (which it is not)

I have flooded the ticket instructions to the letter and have managed to login on my iPad. The pHone still has the issue unresolved.

1) I have added the Xbox Live App and Logged In (Succesfully)

2) Launch the Game Microsoft Solitaire Collection and get error code 11700000

3) Close the Game and Re-launch

4) When Re-launch I should get a pop up that says (game) Xbox Live wants to use xboxlive.com to sign in. Click Continue<<<<<<<I do not get this far. No pop up at all

5) I have deleted the app and readied from the app store

6) I have restarted my phone

7) iPhone 11 Pro, v 14.6 (18F72)

8) Premium subscription

Can anyone here advise what can be done to fix please.