I have the same issue described here: Unable to log into Zendesk, but with some extra complications due to rate limiting.
I’ve tried different browsers, devices, etc. It’s most apparent with secondary administrators (rather the account owner), which always end up in an infinite loop. It happens with the account owner as well, although the cycle is eventually broken and I can get in. This has been an issue for months.
To make matters worse, I get a 429 error from
cloudflare-lb if I attempt more than once, meaning that I’m completely locked out from logging into any account. The rate limit applies to at least four requests for each login attempt:
- Loading the login form
- Submitting the login form
- Loading the 2FA form
- Submitting the 2FA form
Even if I wait long enough to load the login form again, I often get blocked at once of the later request, resulting in cryptic error messages like “Please reload the page”–bad advice, given that the status for the error response is 429. This means I’m locked out of everything–not just Zendesk–for an indeterminate period of time, and any attempt to get back in could mean that it takes even longer.