Description
Sometimes login to admin panel is not possible and the following errors show up:
 
Notice: Undefined variable: current_version in /www/admin/admin_login.php on line 513
 
Warning: Cannot modify header information - headers already sent by (output started at
/www/admin/admin_login.php:513) in /www/admin/admin_login.php on line 563
 
Solution
http://www.viart.com/downloads/admin_login-4.2.zip
 
Download the file and extract 'admin_login.php' into 'admin' folder of your shop replacing the existing file. Please do not forget to make a backup copy of the current file in case something goes wrong.