Cloudflare catcha is throwing an error with reference code 300030 every time I try

What is the name of the domain?

What is the error number?

300030

What is the error message?

An error has occurred. Reference code: 300030

What is the issue you’re encountering

Cloudflare captcha is throwing an error with reference code 300030 every time I try to login to a particular website. It works on other sites, such as dash.cloudflare.com.

What steps have you taken to resolve the issue?

Tried reloading the page, clearing page data.

What are the steps to reproduce the issue?

Browse to the site and try to login.

Screenshot of the error