Check your user account has the right privilages and/or try different web browser...because that is the only way I know of that downloading files works.
Otherwise...setup sftp and use filezilla to download and upload files.
Hi and thanks for the reply.
My user is "root" and i have updated CWP PRO (Centos Web Panel PRO) to the latest and available version 0.9.8.846, i have used 5 different browser (Google Chrome, Mozilla Firefox, Opera, Microsoft Edge and Internet Explorer but the problem, unfortunately, it's not solved !
:-(