A client’s host has recently updated their server to run PHP 7, which has broken their EE 2.5.5. site (“Call to undefined function mysql_connect()”). I tried upgrading EE to version 2.11.9 but get errors: Frontend: can’t find safecracker_lib Control Panel: PATH_MOD not defined in mod_structure.php, fixing this leads down a rabbit hole starting with an error related to not being