PHP Upgrade

Hi there,

I am wanting to upgrade PHP from 5.6.40 to 7.2.
The PHP compatibility plugin shows that the Plugin was too large to scan.

I can see in previous forum posts that 7.2 had issues and 7.1 is okay but that was over a year ago.

Are there any known errors for the upgrade that I need to be sure to fix?

Thank you!

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