NoMethodError: undefined method `authorized_groups' for nil:NilClass

https://sentry.gitlap.com/gitlab/gitlabcom/issues/34981/

NoMethodError: undefined method `authorized_groups' for nil:NilClass
  app/services/projects/participants_service.rb:37:in `groups'
    current_user.authorized_groups.sort_by(&:path).map do |group|
  lib/gitlab/metrics/instrumentation.rb:156:in `block in groups'
    trans.method_call_for(#{label.to_sym.inspect}).measure { super }
  lib/gitlab/metrics/method_call.rb:23:in `measure'
    retval = yield
  lib/gitlab/metrics/instrumentation.rb:156:in `groups'
    trans.method_call_for(#{label.to_sym.inspect}).measure { super }
  app/services/projects/participants_service.rb:9:in `execute'
    participants = noteable_owner + participants_in_noteable + all_members + groups + project_members
...
(121 additional frame(s) were not displayed)

NoMethodError: undefined method `authorized_groups' for nil:NilClass