If you just uploaded the PC version of an avatar, and you change the platform to Android in order the upload the Quest version 100% of the time there will be 2 nonsense warnings at the top of the SDK complaining that the last build was too big. Many people see those warnings and don't fully comprehend that they can be ignored and you can upload anyways.

A super simple fix for this would be to just clear those warnings every time you change build target so that they never show up erroneously.