Failed to clean mesh????

I don't know what happened. Out of nowhere it gives me an error saying "Failed to clean mesh". I never told it to clean a mesh.

cleaning the mesh failed UnityEngine.Transform:set_localScale(Vector3) UnityEngine.Transform:set_localScale(Vector3) UnityEditor.TransformInspector:OnInspectorGUI() UnityEditor.InspectorWindow:OnGUI() System.Reflection.MonoMethod:InternalInvoke(Object, Object[]) System.Reflection.MonoMethod:InternalInvoke(Object, Object[]) System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo) System.Reflection.MethodBase:Invoke(Object, Object[]) UnityEditor.HostView:Invoke(String) UnityEditor.DockArea:OnGUI()

[\unitystuff\proj\external_sources\physx ovodex\SDKs\Cooking\Src\TriangleMeshBuilder.cpp line 363]

I don't know what file it's talking about because I did not make the file that caused this. Does anybody know what I did wrong?

From the stack trace, it looks like PhysX failed creating collision data for a MeshCollider, when the scale of a transform was changed in the inspector.

This means that you probably entered a strange value (either negative, or very very small (or zero), or very very large) for one of the scale coordinates in the Transform inspector of a gameObject which has a MeshCollider. Then, PhysX tried to recalculate the collision data for that MeshCollider, but failed to do so, during numerical problems resulting from low or high values, or because the mesh does no longer make sense when scaled to zero or negative.