I experienced this problem as well when I tried and then realized that Illusion checks your Registry to see if the game is listed in it... so, you need to double-click on the "[BR] HoneySelect 2 Registry Fixer.bat" file in your game folder to list the game in your Registry, then set your entire system to Japanese and retry using your VPN... then you should be able to get in and download characters.Okay, bit of a shot in the dark here seeing as I couldn't find anything specific on the illusion discord aside from a possible shadow ban.
I used to be able to access the HS2 downloader using a VPN, but now I'm getting the error "Failed to confirm user information". Oddly enough, I can still access the AI downloader without issue. I'm not sure if it's an issue of compatibility considering I could still access the downloader in DXR2, and I've double checked and everything is up to date.
Any suggestions? I was going to see if I changing my nickname would allow me to bypass the check, but I can't figure out where that data is stored locally.
Hope that helps.