Failure in /qa/specs/features/ee/browser_ui/3_create/repository/push_rules_spec on Staging - @project.add_member fails

Summary

Failure in /qa/specs/features/ee/browser_ui/3_create/repository/push_rules_spec on Staging

@project.add_member fails

https://ops.gitlab.net/gitlab-org/quality/staging/-/jobs/1805253

Stack trace

 1) Create Push Rules using non signed commits restricts users by email format
     Failure/Error: @project.add_member(gitlab_user, Resource::Members::AccessLevel::MAINTAINER)
     
     QA::Support::Repeater::RetriesExceededError:
       Retry condition not met after 3 attempts
     # ./qa/support/repeater.rb:42:in `repeat_until'
     # ./qa/support/retrier.rb:48:in `retry_until'
     # ./qa/resource/members.rb:11:in `add_member'
     # ./qa/specs/features/ee/browser_ui/3_create/repository/push_rules_spec.rb:60:in `block (4 levels) in <module:QA>'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:123:in `block in run'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:110:in `loop'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:110:in `run'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec_ext/rspec_ext.rb:12:in `run_with_retry'
     # ./spec/spec_helper.rb:70:in `block (2 levels) in <top (required)>'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:123:in `block in run'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:110:in `loop'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:110:in `run'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec_ext/rspec_ext.rb:12:in `run_with_retry'
     # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:37:in `block (2 levels) in setup'
     # ./qa/specs/runner.rb:71:in `perform'
     # ./qa/scenario/template.rb:10:in `block in perform'
     # ./qa/scenario/template.rb:8:in `tap'
     # ./qa/scenario/template.rb:8:in `perform'
     # ./qa/scenario/template.rb:35:in `perform'
     # ./qa/scenario/template.rb:10:in `block in perform'
     # ./qa/scenario/template.rb:8:in `tap'
     # ./qa/scenario/template.rb:8:in `perform'
     # ./qa/scenario/bootable.rb:28:in `launch!'

Screenshot / HTML page

N/A as an API failure

Possible fixes