Upgrade to Version 8 'finfo' error on login page

Permalink
Hello, need help with upgrade and login version 8.1.0
I have upgraded to 8.1.0 through Cpanel and I believe there was an error upon upgrading. However, I was able to login to dashboard. I did try to upload a photo and it seems after that I am unable to access my login page and my website is off. When I type in my web address I get a page that states: An unexpected error occurred. Class 'finfo' not found. <Back to Home button, does nothing. Can someone help?

 
Prohus replied on at Permalink Reply
FYI...I asked my webhost add the finfo plugin for php. They just responded "The fileinfo module was activated". This fixed my problem!