Unknown node type: undefined

I bump into this problem, of Unknown node type: undefined when using Prosemirror, though the current implementation was picked up from my previous React project, but now it’s in Vue.js

Sincerely, I am not sure it’s from Vue I can’t find a solution to this problem

Please what are the requirement for this error to go away?

If you’re putting any ProseMirror objects (view, state) in a Vue data field, the weird magic wrappers it adds to its state will break the library. If that’s not it, I have no idea what’s going wrong here.

a proxy is wrapped around it, when placed in the data field. Vue reactivity system

but in my case, I didn’t

Thanks @marijn , I fixed it