Prefab.unity3d does not exist error

After attempting to test / upload an avatar, I am given the prefab.unity3d error, yet I do not know how to fix the console errors in the console. Here is the image of part of the console (I hope). If anyone can help me find the solution I would greatly appreciate it.

The errors are saying that there is a duplicate of many assemblies.

It looks like you may have accidentally copied or created a Unity project inside another Unity project. Try moving the folder “New Unity Project” (located under /Sploot/sploot) out of your current project. Do this via Explorer and not from Unity’s Project window.