403 Error
PERMISSION_DENIED
Unable to read file/tail/gs:%2F%2Fkokoro_build_logs%2Fkokoro-sisyphus%2Fresultstore%2Fprod%2Fcloud-devrel%2Fpython-docs-samples%2Fpython3.6%2Fperiodic%2F4bbb94d3-67f5-4305-83c0-1b620199d7cd%2Fbuild.log. Either the file does not exist or there is a permission issue.