/app/tmp/cache
/app/tmp
を
777 (or 707?)
/app/.htaccess
/app/webroot/.htaccess
/app/.htaccess/app/webroot/.htaccess
を削除
/app/config/core.php
Configure::write('Security.salt', 'XXXXXXXXXXXXXXXXXXXXXX');
を書き換え
Configure::write('App.baseUrl', env('SCRIPT_NAME'));
Configure::write('Routing.admin', 'admin');
コメントアウト//を削除