Unfortunately I've got the same "failed" issue that others do. Since others have commented on that without adding anything to the discussion, all I can say is that if I figure out a solution that works for me I'll present it. Otherwise, happy that at least others can make it work, haha.
For some context, I'm mainly just trying to DL WoW videos.
Things it isn't
• Windows Defender (This is after I taught it to stop killing the program). Disabled it entirely to see if DLs worked, nothing.
• VPN: Was hoping it was just a "disable ur vpn" problem, but no luck.
• Ran the program in Windows Sandbox. The first time I tried to DL a file, it created a folder and was clearly 'working', but then the folder disappeared and it said 'failed'.