The wrong settings of the web-server you are using likely to cause the errors. You can see the error message trying to install Joomla extension: “Could not create directory (path)” or “Warning: Failed to move file!”. This error is caused by the incorrect permissions set for some folders.
To resolve this issue you need to do the following:
- Open Joomla admin panel and go to System > System Information and open Folder Permissions tab at the top.
- There you can see list or directories that are not writable. Please, assign write permission for it.
- Navigate to your Joomla installation using the hosting file manager or some FTP manager.
- Change the specified folders permissions to 755 or 777 (depends on your server settings).
When all folders are marked as writable you’ll be able to install any extension through the admin panel.