I’m following the instructions to enable / configure SAML for our account, but I’m encountering an error. I select the OKTA integration from the list of Authentication providers, and enter the required metadata.

But then I get this error:

CSRF Verification Failed
​A required security token was not found or was invalid.

Ensure that the Base URL does not have a trailing slash or whitespace at the end (https://sentry.io and not https://sentry.io/) as this is the most common reason for this error message, as it breaks the redirect from OKTA to Sentry. Also, make sure you are using the correct organisation slug.