It's a misconfiguration at the server level, mime types configuration, with wget you get this :
--2022-03-04 14:09:08-- http://raine.1emulation.com/archive/raine32-0.93.4.7z
Résolution de raine.1emulation.com (raine.1emulation.com)… 216.245.218.214
Connexion à raine.1emulation.com (raine.1emulation.com)|216.245.218.214|:80… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : 2902845 (2,8M) [application/x-troff-man]
(the text is in french, sorry, but the mime type appears between () at the end : application/x-troff-man, it's a man page indeed, but it's not my fault).
On my side, it's a simple <a href link, produced by some basic html file, I don't touch the mime type configuration...
And, from there for example : https://github.com/mime-types/ruby-mime-types/issues/32
the mime type should be application/x-7z-compressed
it's minor though, even the most basic browser would kinow how to download this, whatever the mime type is.