Multiple failures on staging-ref due to unable to create pipelines

Summary

Staging-ref has multiple failures related to failing to create pipelines.

Failing Job(s):

Example: https://ops.gitlab.net/gitlab-org/quality/staging-ref/-/jobs/12317227

There are more jobs in this pipeline with similar failures: https://ops.gitlab.net/gitlab-org/quality/staging-ref/-/pipelines/2672319

Failing spec(s):

Multiple

Corresponding test case(s):

Stack trace

     QA::Support::Repeater::WaitExceededError:
       Wait for any pipeline failed after 60 seconds
     # ./qa/support/repeater.rb:74:in `repeat_until'
     # ./qa/support/waiter.rb:20:in `wait_until'
     # ./qa/page/base.rb:76:in `wait_until'
     # ./qa/page/project/pipeline/index.rb:48:in `has_any_pipeline?'

Screenshot / HTML page

Possible fixes