Mail App

Hi,

I'm new to this board. I've searched online for a while to try and find a solution to a problem. It would be much appreciated if someone could give me a hand here.

Whenever I open the 'Mail' App I receive this screen:

I have e-mail accounts set-up already from Outlook and gmail. But this screen always appears.

Up until last month the app was working fine. No idea what triggered the problem.

Thanks in advance.