hCaptcha plug-in

Yes, it happens every time. I opened up dev tools, and the error is:

{"errors":["You need to be logged in to do that."],"error_type":"not_logged_in"}

when performing a POST to /hcaptcha/create.json

Here is a screenshot:

And I am sure the email is not registered and the problem ceased when the plugin is disabled.

BTW, the domain is https://npuer.life/.
I am not sure whether the problem has to do with using CloudFlare as a CDN, let me do a test. and after a test, the error remains the same.