Conflict with Gravity Forms Signature Add-On

So i’m using your plugin to handle a different page with multiple forms, and it works great.

However, i have a form that used the Gravity Forms Signature Add-On to get a customers signature. Since I installed your plugin, that form has a ‘Uncaught TypeError: Cannot read property ‘nodeName’ of null’ error. If I uninstall your plugin, it works fine.

Is there a was to target which forms will have multiples on a page, and possibly prevent the plugin from running if a choosen form is not being used?

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