Transient failure in spec/features/projects/settings/ee/push_rules_settings_spec.rb

As seen in https://gitlab.com/gitlab-org/gitlab-ee/builds/15591968:

  1) Project settings > [EE] repository editing a push rule displays the new value in the form
     Failure/Error: parent.human_name + ' / ' + name

     NoMethodError:
       undefined method `+' for nil:NilClass
     # ./app/models/concerns/routable.rb:199:in `build_full_name'
     # ./app/models/concerns/routable.rb:221:in `prepare_route'
     # ./app/models/concerns/routable.rb:214:in `update_route'
     # ./app/models/concerns/routable.rb:183:in `uncached_full_path'
     # ./app/models/concerns/routable.rb:174:in `full_path'
     # ./app/controllers/projects/application_controller.rb:30:in `project'
     # ./lib/gitlab/middleware/multipart.rb:93:in `call'
     # ./lib/gitlab/request_profiler/middleware.rb:14:in `call'
     # ./lib/gitlab/middleware/go.rb:16:in `call'
     # ./lib/gitlab/etag_caching/middleware.rb:10:in `call'
     # ./lib/gitlab/middleware/readonly_geo.rb:30:in `call'
     # ./lib/gitlab/request_context.rb:18:in `call'
     # ./config/initializers/fix_local_cache_middleware.rb:9:in `call'
     # ./lib/gitlab/middleware/static.rb:9:in `call'
     # ./lib/gitlab/testing/request_blocker_middleware.rb:36:in `call'

Finished in 55 minutes 42 seconds (files took 46.88 seconds to load)
1788 examples, 1 failure

Failed examples:

rspec ./spec/features/projects/settings/ee/push_rules_settings_spec.rb:25 # Project settings > [EE] repository editing a push rule displays the new value in the form