I have had similar issues on other sites. Turns out my ISP is apparently blocking some sites through their DNS.
Try changing your DNS to Cloudflare's or Google's.
Easiest way is to download the "1.1.1.1 + WARP: Safer Internet" app.
Or you can change the DNS on the phone itself
In the Private DNS provider hostname (search on your phone "private dns", it should get you to the right screen), you can type in " one.one.one.one " or " security.cloudflare-dns.com " for Cloudflare's. Google's is just dns.google
Keep in mind that on mobile, the site tries to open new tabs to show ads every time you click on the download link and if they are blocked, it might mess things up. I would recommend trying on a computer instead of a phone.