Yes, now the 403 error likely happens because you removed the SitePro installation, and there is no index file. To fix it, just upload an index file (index.html, index.php, or index.htm) using an FTP client like FileZilla. This will also fix the error saying Either your FTP account quota has been exceeded, or the file upload was blocked by security
since the online file manager can sometimes bug out. Here’s 2 articles that will help: