404 Error When Trying to Approve

Summary

Users at my organization noticed this morning that the approval button on merge requests now reads "Approve with SAML". When clicking to approve, a 404 error is displayed and the approval cannot be completed.

Steps to reproduce

1. Open an unapproved merge request
2. Click "Approve with SAML"

Example Project

https://gitlab.com/robotmorning/integration/erp-tooling/epicor10_2_600

What is the current bug behavior?

The user sees a 404 page displayed.

What is the expected correct behavior?

The user sees an authentication page. Once they authenticate, their approval is recorded on the merge request.

Relevant logs and/or screenshots

Screen_Recording_2023-11-13_at_10.49.10_AM

Output of checks

Results of GitLab environment info

We are using GitLab Cloud.

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Results of GitLab application Check

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