Reply To: Mailchimp integration not working

I can’t seem to post the response code. the backticks are not working. I see no error message.
I put it in a txt file and uploaded it for you to see:

https://nlgene-santhoven.savviihq.com/screenshots/mailchimp-request1.txt

I tried enabling and disabling Opt-in in Mailchimp and in Quform, but nothing seems to work.

Hope you can help