That question was probably asked for thousand times already, but still, it keeps coming back. Lemme tell you a little bit of backstory, so, maybe, newer thread viewers could relate to the problem abit: 1. When I found out I can upload my stuff to the VRChat, with SFXes, sounds, custom animations and stuff, I was so hyped. I got my Unity 2017 and the newest version of VRCSDK installed and imported. I've opened the top first avatar creating tutorial I saw on Youtube, and after I got it all the way through with the avatar creation, I've got stuck with the avatar uploading. 2. At that point, I've got the error. It just wouldn't let me through. After some research, I've found out, that I was using the wrong version of Unity, so I've removed it, and got the 5.6.3p1 Personal (64bit) up. I had to repeat the whole tutorial just in case my old avatar could be somehow corrupted after downgrading the Unity version, just in case. 3. But still, the error kept on appearing. After a slight research, I've found out that you wouldn't be able to upload your stuff until you reach the New User rank. Even though it said in the VRChat Settings that was possible for me to do that. I had a Steam account, so I've registered a new VRChat account directly from the VRChat official website, linked it with the Steam account and got it upgraded to the New User rank(just got the email telling me I can now upload my own avatars and worlds). And now, for the main part - Problem is still there. What I've tried: 1) Uploading the avatar several times(17 times and counting). 2) Detaching the Pipeline Manager(5 or 6 times). 3) Uploading with delays inbetween, to give servers some rest in case they're overloaded. 4) Reinstalling Unity 5) Reimporting VRCSDK 6) Redoing the avatar from scratch 7) Disabling the Future Proof Publishing 8) Relogging 9) Full PC Restart I have no firewalls nor any kind of internet data blockers. My antivirus is in a disabled state, so It won't be able to recognize Unity app as a threat. I have no other critical error messages to be aware of at the Unity app. It just simply won't bother uploading the avatar. Right after I set the name and the description for my avatar and press "Upload", it'll stuck in a 0% "Uploading file..." state for 2-3 minutes, and then throw the error afterwards. I'm kinda baffled with the situation. Am I doing something wrong? Any help would be appreciated! Thanks for your attention!