Magento Admin Panel not found (404)

Question

Can't open Admin Panel at Magento: "The page you requested was not found. But, we're on it..." :(

Logs are:

2015-08-09T08:41:49+00:00 ERR (3): Notice: Undefined index: catalog.topnav  in /home2/shoptell/public_html/app/code/core/Mage/Core/Model/Layout.php on line 460
2015-08-09T08:41:50+00:00 ERR (3): Notice: Undefined variable: nothumbnail  in/home2/shoptell/public_html/app/code/local/Cmsmart/Megamenu/Block/Navigation.php on line 95
2015-08-09T08:41:50+00:00 ERR (3): Notice: Undefined variable: nothumbnail  in /home2/shoptell/public_html/app/code/local/Cmsmart/Megamenu/Block/Navigation.php on line 95

And other "Undefined variable" errors. Tried (but what for?) to make a SQL request as described at "Error 404 Not Found" in Magento Admin Login Page but same no result. Same as clean var/cache. Main page is working. Only Admin Panel.

Does anybody can help with that problem? Don't know how correct solve problems of in logs. 问题。

(besides, try to add maintance.flag into root - site all the same is available)

Answer 1

have you tried resetting the file permissions?

from the command line try running:

sudo find . -type f -exec chmod 644 {} \; && sudo find . -type d -exec chmod 755 {} \; && sudo chmod o+w var var/.htaccess app/etc && sudo chmod 550 mage && sudo chmod -R o+w media && sudo chmod -R 777 var/ media/