Unity 5.3.2 is incompatible with Vuforia. You have to use unity 5.3.1f1 of 5.3.1p3 (I dont’ know if they fixed it in 5.3.3).
Unity 5.3.2 is incompatible with Vuforia. You have to use unity 5.3.1f1 of 5.3.1p3 (I dont’ know if they fixed it in 5.3.3).