User id must be in the form of Guid, User id

[Gatienbarlier]

Hello,

I have this issue :

Response content:
{"error":{"code":"BadRequest","message":"{\r\n "_version": 3,\r\n "Message": "User id must be in the form of Guid, User id

And script stop ...

Can you help me ?

Many thanks

[BrooksHireService]

The problem is with the Get-AADuser when the users logged in is null. Get-AADUser outputs all.