I went in the advanced setting and disabled mage core. I have no more admin area. I do I restore mage core.
1Go to core_config_data in the database and search where path = advanced/modules_disable_output/Mage_Core, then delete the row. Clear var/cache after. In the future don't use disable module output in the admin and instead edit config files when you want to disable modules (but you'll never want to disable Mage_Core anyways).– Matt DunbarNov 29, 2014 at 1:02
Found Remove Engine lever...– Fiasco LabsNov 29, 2014 at 5:53
Run the following SQL query in your phpMyAdmin or mysql console:
UPDATE core_config_data SET value=0 WHERE path='advanced/modules_disable_output/Mage_Core';
The query above assuming your database table prefix is empty, otherwise append 'core_config_data' with your database table prefix, which is defined in 'app/etc/local.xml'.
After that Flush Magento cache by deleting all subfolders of var/cache/ directory, or run (ask your hosting to run) the following command in your SSH console:
find ./var/cache/ -type f -delete
Replace ./var/cache/ in the command above with full path to var/cache directory of your Magento installation.