Application Error: Client side exception has occured

I am new with builder.io and would like to ask how can I get the wysiwyg page loading again. I am getting an error saying

TypeError: can’t access property “data”, el’case-study’].value is undefined

but does not know where I can update the JS. Can anyone point me on the right direction so I can study it and fix my issue.

Thanks!

Builder content link

Builder public api key
c9f73fd11785496381627394f85aa6aa

What are you trying to accomplish
Make the wysiwyg loading properly again

Screenshots or video link

Code stack you are integrating Builder with
NextJS