According to the error message, your WordPress got a copy of the latest version of URE Pro from role-editor.com server successfully, but it (WP) can not write new files to the user-role-editor-pro folder. This problem is resolved generally by setting right folder permissions.

I may look at if you provide an admin access to WordPress and FTP access to its installation folder. If it’s applicable for you, send credentials to support [at-sign] role-editor.com