There are different error messages a user may receive when experiencing issues logging in via the Watermark SSO (aka Watermark Navigator).
There is a copy/paste widget to capture technical details that can be provided to Client Support. This information is valuable to expedite troubleshooting.
Other links in the error message provide the user a path to the Watermark Help Center.
You can follow the steps for taking a screenshot here.
You can then contact support and share the technical details. Please see example error messaging below: