I’ve updated Magento via Magento Connect from 1.5 to 1.6 and got a whitescreen after i pressed the refresh button.
In first place, the front-end and back-end gave me this message:
“the server is temporarily unable to service your request due to maintenance downtime or capacity problems. please try again later.”
After clearing the cash by ftp and restarting the server, the front- and back-end are giving a whitescreen to.
I pasted ini_set(’display_errors’, 1); in the index page what brought me to this error:
Fatal error: Undefined class constant ‘XML_PATH_USE_CUSTOM_ADMIN_URL\’ in /var/www/vhosts/roywulmsdesign.nl/httpdocs/magento/app/code/core/Mage/Core/Controller/Varien/Router/Admin.php on line 123
I’ll hope, somebody can help me!