There has been a critical error on this website. Please check your site admin em

Hi,

have been messing around updating several plugins and I think I deleted cornerstore, a plug in that comes with xtheme, the theme that I use.

After I deleted this plug-in, I get this message: There has been a critical error on this website. Please check your site admin email inbox for instructions.

Not sure what to do, I had backed up my site with updraftplus before doing this.

The website is up and running, but I can’t enter the admin or do any changes.

The page I need help with: [log in to see the link]