Unfortunately, .rar files cannot be extracted on our shared servers. Please re-upload a .zip or .tar.gz files and you will be able to extract them without any problems. Note: you can find a tutorial about it here - How to extract compressed files.
To extract rar/zip files, please use the "Extract files from archive" feature in your File manager. You can also provide a .zip file of all your website files to our "Import Website" too, which is accessible from your Control Panel and it will extract everything to your home directory.