If you are using a2hosting then you have a problem of your joomal 3.6 version during the fresh installation. Then the solution is to add this code in your root server of the file of your joomla
This works if you are using a2hosting server or (works for PHP 5.3 and higher):
Open File Manager;
Create ‘.user.ini’ file in your Joomla root directory;
Note: Use notepad to add the code then upload to your website server where you domain or subdomain is located.
Add this code to the file and save changes:
magic_quotes_gpc = Off