Joomla - JFolder::create: Could not create directory
When running Joomla 2.5 you may observe the following error :
Solution
This error is typically related to permissions. To resolve the issue run the following commands (replacing the path with the path of your Joomla installation).
cd /var/www/html/joomla-site
find . -type f -exec chmod 644 {} \;
find . -type d -exec chmod 755 {} \;
chmod 777 cache