Can I get some help with some Windows Phone 8.1 update problems I am having with mail?

[WPCentral Question]

Windows Phone 8.1 update problems with mail.

All functions except mail works. when I push mail icon I see my mail, but it is not updated and I can not see the individual mail. the screen is simply locked. No scroll. My phone is Lumnia 920. All update until now has been succesfull. Best regards Bjorn Mikkelsen