failed integration with loops.so

[WimCasteels]

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Bug description

Following the integration with loops.so for a newsletter it is not possible to add email addresses from my website. I always get the message "Too many signups, please try again in a little while"

How to reproduce the bug

Go to my website: https://wimcasteels.be/
Fill in an email address at the bottom
click "registreer"
You get the message "Too many signups, please try again in a little while"

Error messages and logs

Too many signups, please try again in a little while

What operating system are you using?

Not applicable (e.g. you're using GitHub Pages or other hosting)

Where are you seeing the problem on?

Running locally with Docker (devcontainer), Deployed site

More info

This message comes from what is called "// check for cloudflare error" in the script 'newsletter.js'.
I also tested the endpoint of loops.so from another script which works and does not seem to cause the issue.

[george-gca]

Maybe @asboyer can help with this, he implemented it in #2517.

[WimCasteels]

@george-gca thanks for the reference!
I'm not sure what caused the problem but by using part of the code of the repo of @asboyer it now works :)
Great project by the way!!!