Error with this plugin and cant use contact form

Why is this error occuring? It dissapears when I turn of the plugin which I did right now as a temporary solution.

keweb.ee/:1 Uncaught (in promise)

1. Response {type: ‘basic’, url: ‘https://keweb.ee/wp-json/contact-form-7/v1/contact-forms/790/feedback/schema’, redirected: false, status: 500, ok: false, …}
   1. body: (…)
   2. bodyUsed: false
   3. headers: Headers {}
   4. ok: false
   5. redirected: false
   6. status: 500
   7. statusText: “”
   8. type: “basic”
   9. url: “https://keweb.ee/wp-json/contact-form-7/v1/contact-forms/790/feedback/schema”
   10. Prototype: Response

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