Upfront after SSL instalation

Hi, I activated 'Let's Encrypt SSL' through my CPanel after working with Upfront and Scribe.
A few images on the site don't show anymore however, some do. I thought this could be fixed by renaming any broken links but when I try to access Upfront though admin I get the message "You do not have sufficient permissions to access this page." The front end editor is also greyd out and doesn't let me click.

I tried removing Upfront and Scribe via ftp and reinstalling the themes but the same problem is there.
My hosting is Siteground.