RuntimeError: no policy for String
https://sentry.gitlab.net/gitlab/gitlabcom/issues/803044/
RuntimeError: no policy for String
declarative_policy.rb:40:in `class_for'
raise "no policy for #{subject.class.name}" if policy_class.nil?
declarative_policy.rb:29:in `block in policy_for'
class_for(subject).new(user, subject, opts)
active_support/dependencies/interlock.rb:46:in `block in permit_concurrent_loads'
yield
active_support/concurrency/share_lock.rb:185:in `yield_shares'
yield
active_support/dependencies/interlock.rb:45:in `permit_concurrent_loads'
@lock.yield_shares(compatible: [:load]) do
...
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RuntimeError: no policy for String