Script / root directory error in Joomla installation

Script / root directory error in Joomla installation
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This joomla error is common and I have provided the solution below

Solution:

Joomla is installed through fantastico in control panels

So when you come across such errors go to  ./fanatastico in the home directory of the user via command line.

And look for the file installed_in_root.php. You should see something like

Code:

$installed_in_root["addondomain.com"] = 1;

If you delete this line starting with the $ and ending with ;, that should fix this. Commenting this line with prefix # will also helps to solve the problem

Comment me if you need further clarifications.