Accessing Mirror support tools from the primary server results in "You're not authorized to view this page. Please log in as an administrator"

Issue Summary

Accessing the Support tools for Mirrors hosted on a different domain from the primary server using Google Chrome or Chromium-based browsers results in the following:

"You're not authorized to view this page. Please log in as an administrator or contact your administrators for help."

Steps to Reproduce

1. Setup a Bitbucket Datacenter instance hosted on bitbucket.mydomain.com
2. Step up a Mirror node hosted on mirror.otherdomain.com and register it with the upstream (bitbucket.mydomain.com)
3. Authorize the mirror in the primary server
4. Administration --> Troubleshooting and Support Tools - mirror

Expected Results

Be able to access the troubleshooting page support tools/create support zip.

Actual Results

"You're not authorized to view this page. Please log in as an administrator or contact your administrators for help."

Workaround

• Use no Chromium-based browsers such as Firefox.
• Open Developer tools in Chrome > Console and run the following command -

  window.open(document.querySelector("iframe").src, "_blank")