Hi,
I have a few flows in Power Automate that are triggered by form responses, gets the response data and creates a SharePoint item in a list. There is an assignee field in the form where the user just simply types in the email address of the user they want to assign it to (I am aware I could do this better with Power Apps). These flows had worked for about 2 months, until recently every time someone submits the form it presents an error saying the user cannot be found.

In the below screenshot you can see the Logged By field which is automatically fetched from the Responder's Email Address (which is working fine) is matching identical to the Assignee Claims fields (had to blank out domain etc.)

I've tried using Office 365 Get User Profile (V2) also but was presented with the same error.
Also wanted to note that we have an account implemented to host all of the Power Automate flows throughout the business, but as far as I am aware there were no changes made to the licensing of this user etc. but it isn't logged into any PCs in recent time. Could this be causing issues with fetching users?
Any help would be greatly appreciated! Thanks in advance 🙂