Indeed.

I'll try uploading it to Yandex Disk if it works on my laptop (Yandex is supposedly blocked in Ukraine).

I sympathize. Greetings from Donetsk, Ukraine)). Anyway, this isn't right either. I downloaded 3.8 KB. Something's not right here. I have all the maps/campaigns/scenarios from here on my PC. Just for fun - the smallest file (sorted by size) is the "Campaign History of Zallula" at 876 KB! I don't think a campaign can fit into 3 KB.
And how much does it actually weigh on your PC?