Thank you page not loading

Hello Support,

I've created a form and integrated it into my website and it worked fine.

I then wanted to change the "thank you" and "confirmation" pages. I got the new code implemented it but now it does not work.

The error message I keep getting is:

{"inlineMessage":"","responseType":"ZC_TYPEJSON","targetUrl":" https://countrynavigator.com/insights/thank-you/","newOptinResponse":1,"targetWindow":"_self"}

You can see my original form that I integrated the code into here: https://countrynavigator.com/insights/ (scroll down a little and use the first form)

...and you can see my zoho test form with just your code here: https://countrynavigator.com/insights/zoho-test/

Both generate the same error code.

Can you help?