Hi team ,
I found that when I can access from original ip to the web site ,.This disable Https secure connection.
First I make DNS Lookup to find the ip adress
download.nextcloud.com has address 184.108.40.206
Now When I open The website from download.nextcloud.com I see it's over ssl so Can download securily .
But when I Enter 220.127.116.11 I also access the site so It's not secure to download .
Also this disable many protection when downloading .
The user download your app over insecure connection.