Unable to read file/tail/gs:%2F%2Fkokoro_build_logs%2Fresultstore%2Fprod%2Fgolang%2Fpkgsite%2Fgcp_ubuntu%2Fpresubmit%2Ff4b13cd5-d8ba-4108-925d-79b58e4109ba%2Fbuild.log. Either the file does not exist or there is a permission issue.