RSpec Flaky pruner failure / Job Failed #62392094

Job #62392094 failed for 39d91a9c:

$ scripts/prune-old-flaky-specs ${FLAKY_RSPEC_SUITE_REPORT_PATH}
/usr/local/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- active_support/hash_with_indifferent_access (LoadError)
	from /usr/local/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:59:in `require'