Hi there, on this page https://fcboats.co.nz/warranty-registration/, the captch not working, however it works on the other forms on the other pages.
Hello. Checking your page, I see a few jQuery errors in the developer console. Those are probably related. You can check for conflicts on the site using the Health Check & Troubleshooting Plugin from WordPress. We have an article on how to do that on our website here: Testing for a Theme/Plugin Conflict using the Health Check & Troubleshooting Plugin - Gravity Forms Documentation
Or you can open a support ticket here:
The first step with support will likely be to perform the conflict test, so I recommend performing that first in any event. Thank you.