Downloading mod thumbnail through HttpClient

[Rikitav]

I programming a small browser on C# to view and download mods using the internal Mod Portal API. Everything works gorgeous and the lists of mods are loaded, but when it comes to the assets, problems began. I use the most ordinary HttpClient for requests and when I try to request Thumbnail (let it be https://assets-mod.factorio.com/assets/ ... .thumb.png), the request is interrupted with the exception "this host is unknown. (Assets-mod.Factorio.com:443)", although everything in the regular browser is calmly opening.