Thanks Alex,
The migrate helper didn’t seem to have an impact, but I enabled it anyway in case it does some important work in the background. After testing the plugins one by one, there was a plugin called “Responsive Lightbox & Gallery” that seemed to be causing the issue. Once I deactivated it I was able to access my websites again. Thank you so much for your help. It gave me the lead I needed to pinpoint where the issue was coming from.
