Uncaught Error: Minified React error #200;

On one of my clients sites, whenever I view caldera forms, backend menu or frontend form, I get this error in the console. Only appears when Caldera is visible(even in preview form mode). I tried deactivating all plugins, but error still exist.

I also have a error where Ajax isn’t working on this site. Form only submits when deactivating the AJAX submission. Maybe they are related?

index.min.js?ver=1.7.4:22 Uncaught Error: Minified React error #200; visit https://reactjs.org/docs/error-decoder.html?invariant=200 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. 
    at r (index.min.js?ver=1.7.4:22)
    at o (index.min.js?ver=1.7.4:22)
    at vr (index.min.js?ver=1.7.4:22)
    at Object.render (index.min.js?ver=1.7.4:30)
    at Object.<anonymous> (index.min.js?ver=1.7.4:14)
    at Object.<anonymous> (index.min.js?ver=1.7.4:14)
    at t (index.min.js?ver=1.7.4:1)
    at index.min.js?ver=1.7.4:1
    at index.min.js?ver=1.7.4:1

• This topic was modified 6 years, 2 months ago by Fredrik Westerlund.

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