I was installing a few extensions and I received an Error 503.
After reading other posts, someone was suggesting to remove the maintenance file.
I deleted the file and now getting the following error.
Fatal error: Class ‘Aftership_Track_Model_Resource_Mysql4_Setup’ not found in /home/content/54/10548354/html/includes/src/Mage_Core_Model_Resource_Setup.php on line 234
Would appreciate any help. Thanks all.