Contact Form 7 not working

Hello,
today i noticed that contact forms are not working on our site. we are using 5-7 contact forms on our site and none of them seem to be working. please check the link to one of our pages on which we’ve added contact form.

Below is the error i get in console after trying to submit the form.

POST https://odooerp.ae/wp-json/contact-form-7/v1/contact-forms/5/feedback 500

body
: 
ReadableStream
bodyUsed
: 
false
headers
: Headers {}
ok
: 
false
redirected
: 
false
status
: 
500
statusText
: 
""
type
: 
"basic"
url
: 
"https://odooerp.ae/wp-json/contact-form-7/v1/contact-forms/650/feedback"
[[Prototype]]
: 
Response

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