When I execute cron job manually, I got the error message as below: PHP Notice: Undefined variable: lastSync in /var/www/vhosts/myhost.com/httpdocs/custom/include/Google/DriveHelper.php on line 244 PHP Notice: Undefined offset: 0 in /var/www/vhosts/myhost.com/httpdocs/custom/include/Google/google-api-php-client/GoogleDrive.php on line 220 PHP Fatal error: Uncaught Error: Call to a member function getId() on null in /var/www/vhosts/myhost.com/httpdocs/custom/include/Google/google-api-php-client/GoogleDrive.php:220 Stack trace:

0 /var/www/vhosts/myhost.com/httpdocs/custom/include/Google/DriveHelper.php(247): GoogleDrive->getUpdatedFiles(Object(Google_DriveService))

1 /var/www/vhosts/myhost.com/httpdocs/custom/include/Google/GoogleHelper.php(159): DriveHelper::checkGSyncFolders(Object(Google_DriveService))

2 /var/www/vhosts/myhost.com/httpdocs/custom/include/Google/GoogleHelper.php(50): GoogleHelper->syncGdrive('2013-01-01 01:0...')

3 /var/www/vhosts/myhost.com/httpdocs/custom/modules/Schedulers/Ext/ScheduledTasks/scheduledtasks.ext.php(357): GoogleHelper->performSync('myemail@gma...', '98941e10-1ced-a...', '2013-01-01 01:0...', 'drive')

4 /var/www/vhosts/myhost.com/httpdocs/modules/SchedulersJobs/SchedulersJob.php(539): googleDriveSync(Object(SchedulersJob))

5 /var/www/vhosts/myhost.com/httpdocs/include/SugarQueue/SugarCronJobs.php(191): in /var/www/vhosts/myhost.com/httpdocs/custom/include/Google/google-api-php-client/GoogleDrive.php on line 220

Suppose Google drive is not working well. How can I fix it? Thank you