Assertion failed: Assertion failed on expression: 'ptr == NULL || !HAS_ROOT_REFERENCE(GET_CURRENT_ALLOC_ROOT_REFERENCE()) || GET_CURRENT_ALLOC_ROOT_REFERENCE() == GET_ROOT_REFERENCE(s_MonoDomainContainer, kMemMono)' UnityEngine.GUISkin:OnEnable() The above error appears when opening and building the project. Thank you.