I'm trying to log on ClassiCube from a 2004 custom built PC, the game downloads and is usable but stops at error 12031 when trying to download sound data.

Date and time is set right, and I'm running Windows XP SP3.

I don't know where to find it, but I just need the mirror where the game grabs its data from so that I can manually download and drag it to the game folder from Mypal.

Any help would be appreciated.

Resources will need to be manually added to the ClassiCube folder for older machines. I suggest just running ClassiCube on a modern machine and copying over the resource folders.

Depending on how old your OS is, you may also need to enable the http-no-https option if you plan on logging in to a ClassiCube account, but only do that if it doesn't work without it, because turning HTTPS off will send your CC account credentials unencrypted, in plaintext.

Actually, the site ClassiCube downloads its resources from requires you to connect using https, if you connect through http you get a 400 error.
Which is why older clients cannot download sound resources as well(see screenshot).

However, if it is the .wav files you need, I can manually provide the links needed, if you so wish.