a:2:{s:8:"26_93152";a:5:{s:5:"insid";s:8:"26_93152";s:8:"from_ver";s:5:"6.6.1";s:6:"to_ver";N;s:10:"error_code";i:1;s:5:"error";s:129:"Backup was not successful so aborting the upgrade process. Following are the details :
The Installation Directory does not exist.";}s:8:"26_69540";a:5:{s:5:"insid";s:8:"26_69540";s:8:"from_ver";s:5:"6.7.1";s:6:"to_ver";s:5:"6.7.2";s:10:"error_code";i:1;s:5:"error";s:210:"The pre upgrade checks FAILED as external URL(s) could not be accessed.
 This might be due to allow_url_fopen() disabled on your server or CURL failed to access the URL. Hence Auto upgrade can not be performed.";}}