Browser Closed Prematurely
If the browser closes or crashes while installing software, the installation may be incomplete and potentially fail. Attempting to install again will generate the Files Already Exist error.
This error can sometimes be identified by the site loading with errors or in an incomplete form lacking images or content after the installation. This can be resolved by removing the files for the software from the directory using File Manager.
Once the incomplete installation has been removed, you may attempt to install the software again.