500 internal server error at back end - Joomla

Question

I have installed new site in Joomla 1.7 and its working fine, but when i checked its back-end (administrator) got 500 Internal Server Error.

Note: Site

Answer 1

I experienced something similar on my site. Digging through the log file, /administrator/error_log i saw this error message:

[08-Oct-2012 15:28:59] PHP Fatal error: Call to a member function login() on a non-object in /home/XXX/public_html/administrator/components/com_login/admin.login.php on line 65 .

Problem was, i had a previous installation of Joomla 1.5.x, and uploaded files for Joomla 1.6 to replace the previous files and upgrade security of the site. Took me almost a month to find a solution for my own case;

Finally found out from this website that I needed to completely delete all previous files in the website root directory before uploading a new version of Joomla.

Hope this helps someone out there who is in the same situation!

Answer 2

Change the permissions of all of your files/directories.

• Files should be 755
• Directories should be 644

Answer 3

Check your error logs and backtrace what is causing the error. It sounds like you have MySQL errors, make sure any of your components/modules/aren't tricking out your site.

Think it's a component?

You can login into PHPMyAdmin and disable/enable modules manually by unpublishing them using the table editor, changing isPublished to 0 .

Answer 4

Change the permission of folder administrator at 775 or 755

Answer 5

This is my case and my solution:

I have changed my server and got this error. I have protected my administrator folder using password protection method. So I have checked my new server and found that my protection information are not saved in control panel. also my .htaccess file (in administrator folder) is not compatible to my new server.

The solution:

1. Simply protect my folder using control panel
2. I have renamed the .htaccess file to htaccess.txt

It is done.

I hope it could be useful ;)

Answer 6

May be some files are not uploded.Check failed transfer of your FTP server.Make sure all the files are uploded online