Error 500 when showing details for a Pages custom domain

Description of the problem

Attempting to delete or show details for a Custom Domain on a Pages site leads to error 500

Which Group/Project (with full path) is experiencing the issue?

https://gitlab.com/falkirkLUG/falkirklug.gitlab.io/pages

Approximate date/time when the error occurred.

21:30 GMT

Describe what you were doing right before the issue occurred.

I'm creating a new GitLab.com Pages site with a custom domain. I've uploaded the Jekyll repo, confirmed that the runner is working, and that I can view the site at https://falkirklug.gitlab.io. Now I want to set up the custom domain and view the details to get the DNS settings, but I can't - it leads to an error 500.

Associated Sentry error: https://sentry.gitlap.com/gitlab/gitlabcom/issues/17079/

moved from gitlab-com/support-forum#1385 (closed)

Looks to be associated with RC4, Sentry reports commence on the 21st December

Thanks for reporting @gwmngilfen. This seems to be a regression introduced by the latest Release Candidate deployed to GitLab.com

added ~978335 ~91797 pages regression labels

changed milestone to %8.15

/cc @stanhu

I have the same error when trying to go to details page of a domain.

500 for the domain I want to edit. 404 for the domain I want to delete.

assigned to @timothyandrew

mentioned in issue gitlab-com/support-forum#1395 (closed)

mentioned in issue #1448 (closed)

mentioned in merge request !993 (merged)

@markglenfletcher I've fixed this issue in !993 (merged). I'll send it out for review once I've added a few tests. Could you add the MR to the regressions post?

@timothyandrew Done! Thanks!

closed via merge request !993 (merged)

mentioned in commit 7513b619