That error could be coming from Porkbun, as they use Cloudflare (their nameservers are just branded Cloudflare nameservers)… or your hosting provider if they use Cloudflare.
Right now I don’t see any Cloudflare error page on your domain. The domain does not resolve to an IP address at all: I’m seeing ERR_NAME_NOT_RESOLVED.
So it seems the issue you were concerned with and reported here is fixed already.
Since making the original post, I paused Cloudflare protection on my website. Then I changed the DNS to HostGator. So far almost all the files can be resolved, but when I get a back click from a paypal purchase, the Cloudflare error page is displayed:
So it’s clear your domain is not using Cloudflare directly, and your own Cloudflare account cannot have any impact on the error you’re seeing.
But the domain is pointed at Thinkific (www.bunnyboot.camp is CNAME’d to hopper.thinkific.com). Thinkific is a Cloudflare customer.
So the Cloudflare error you’re seeing is at Thinkific’s end. If you’re still using Thinkific for your website, then you need to contact them for assistance. If you’re NOT using Thinkific any longer, then point your domain away from them.
Please Note: The above analysis is for the domain in the PayPal link you provided bunnyboot.camp. This domain is different from the one in your original post bunnycode.camp.