@Giorgio

We cannot confirm the exact problem but It looks like there must be some internal configuration on the server such as config.ini file.

Please create a ticket at https://support.uvdesk.com/en/customer/create-ticket/ and provide us your FTP details and admin login credentials. So that we check it on your server.

Thanks

@ecolr
while installation allow_url_fopen must be 1.
In the system compatibility we check ini_get('allow_url_fopen') and it is returning 0 on your server.
So you can first contact your host provider once regarding this.
If issue still persists then please create a ticket at https://webkul.uvdesk.com/en/customer/create-ticket/ and provide us with URL on which you are instatlling QloApps and FTP details in that ticket.