If you will ever want to install additional modules/components you will need to login to ftp via any ftp client, like in this article on how to connect, and change permissions for folders "modules" and "components" to 0777. After you finish installation, make sure you change that back to 0755. To change permissions, right-click the folder, select Properties and update Octal permissions field.
Without updating permissions, your future module/component installs will fail. You shouldn't leave your folders with 0777 permission either because it will be a serious security vulnerability on your website.