Webhooks API consistent failure HTTP 500

[just-paja]

Problem description

I have a repository set up in docker hub. It has Automated Builds configured for tags like this:

• ^v(((([0-9]+).[0-9]+).[0-9]+)(-.+)?)$ -> {\1}
• ^v(((([0-9]+).[0-9]+).[0-9]+)(-.+)?)$ -> {\2}
• ^v(((([0-9]+).[0-9]+).[0-9]+)(-.+)?)$ -> {\3}
• ^v(((([0-9]+).[0-9]+).[0-9]+)(-.+)?)$ -> {\4}

When I push tags into Github repo, the webhook is triggered:

{
  "ref": "refs/tags/v0.5.3",
...
}

...but it gives me consistently error 500:

{"error": "Our service is temporarily unavailable. We'll be back soon!"}

[github-actions[bot]]

We are clearing up our old issues and your ticket has been open for 6 months with no activity. Remove stale label or comment or this will be closed in 15 days.