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I just installed Magento but when i try to open the admin panel i get a blank page. The only thing that is visible is the banner. It says

Fatal error: Class 'Mage_Compiler_Helper_Data' not found in /var/www/app/Mage.php on line 547

Debian 7.8 x64 Nginx PHP fastcgi

closed as off-topic by Fabian Schmengler, 7ochem, Marius Jul 21 '15 at 14:25

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions describing a problem that can't be reproduced OR seemingly went away on its own (or went away when a typo was fixed) are off-topic as they are unlikely to help future readers." – Fabian Schmengler, Marius
If this question can be reworded to fit the rules in the help center, please edit the question.

  • If you have logging enabled, you should have an error trace, which will give you a clue where the error is caused. I'm guessing your Magento app wasn't installed correctly since that helper should not cause issues. – musicliftsme May 18 '15 at 23:24

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