Fatal error when accessing Civicrm administrator page
You have two options for troubleshooting:


Debug and backtrace info should also be in your CiviCRM logs, stored in the ConfigAndLog directory.
You can enable debug and backtrace by adding these three lines to civicrm.settings.php:

global $civicrm_settings;
$civicrm_setting['Developer Preferences']['debug_enabled'] = TRUE;
$civicrm_setting['Developer Preferences']['backtrace'] = TRUE;