
April JoyA.44495 (Customer) asked a question.
i am using reactjs and i am having issue with this error. i always encounter cannot POST {url} and it gets a 404 not found error on okta request after redirecting back from okta sign in so i can't seem to get the saml response.

I know this is not a ton of help but have you tried a plugin like SAML-tracer to help you debug? We've used it to help us debug SAML issues and pretty easy to install as a browser plugin (Chrome) and use.
https://github.com/SimpleSAMLphp/SAML-tracer