No mail found then persistent error message on PC only

What you were expecting to happen, and what actually happened?
When I went into game on PC I saw mail icon was flashing. When I checked mail I was told there is no mail.

But when I check on mobile (Android):

Then when I close down the mailbox on PC:

There is a line of text there that is to small to read (should be another bug report for the auto font size functionality).
This window pops back up immediately when I click retry and my only recourse is to alt-F4 to get out. When I go back into GoW all is normal again but that damn mailbox flag keep beckoning me “Click me, I promise to work this time, no, really this time will be ok”.

What are the steps to make it happen again?
For me it happens every time I login to PC GoW. I have restarted the game multiple times and validated local files from Steam Client.

Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!

Done and done.