Logged in User gets 503 when accessing https://gitlab.com (or https://gitlab.com/dashboard/projects)

https://sentry.gitlap.com/gitlab/gitlabcom/issues/218899/

ZD: https://gitlab.zendesk.com/agent/tickets/97959 (internal)

GRPC::Internal: 13:exit status 128
  grpc/generic/active_call.rb:31:in `check_status'
    fail GRPC::BadStatus.new_status_exception(
  grpc/generic/active_call.rb:180:in `attach_status_results_and_complete_call'
    recv_status_batch_result.check_status
  grpc/generic/active_call.rb:372:in `request_response'
    attach_status_results_and_complete_call(batch_result)
  grpc/generic/client_stub.rb:178:in `block in request_response'
    c.request_response(req, metadata: metadata)
  grpc/generic/interceptors.rb:170:in `intercept!'
    return yield if @interceptors.none?
...
(290 additional frame(s) were not displayed)

Gitlab::Git::CommandError: 13:exit status 128
  gitlab/git/repository.rb:1456:in `rescue in gitaly_migrate'
    raise CommandError.new(e)
  gitlab/git/repository.rb:1449:in `gitaly_migrate'
    def gitaly_migrate(method, status: Gitlab::GitalyClient::MigrationStatus::OPT_IN, &block)
  gitlab/git/repository.rb:123:in `root_ref'
    @root_ref ||= gitaly_migrate(:root_ref) do |is_enabled|
  repository.rb:481:in `root_ref'
    raw_repository&.root_ref or raise Gitlab::Git::Repository::NoRepository # rubocop:disable Style/AndOr
  gitlab/metrics/instrumentation.rb:159:in `block in _uncached_root_ref'
    .measure { super }
...
(276 additional frame(s) were not displayed)

Gitlab::Git::CommandError: 13:exit status 128