We've unlocked the vox-l artifact on your account -- would you try testing the badge again in the simulator on the badge page?
Meanwhile, badges should still unlock and you should be able to test mods in minecraft. Let me know if you're having trouble using learntomod with Minecraft and I'll be happy to help.
Meanwhile, the vox-l badges should unlock after reaching 100% complete and you should be able to test your mods in Minecraft including any mystery mods. If you're having trouble using our server or running mods in it, please let me know and I'll be happy to help.