I got this error when I follow this: Unity iOS build error: duplicate symbols when using Firebase Unity SDK + Google VR SDK for Unity, I also experience the same duplicate symbols using Firebase SDK and GoogleVr SDK:
"_kGTMSessionFetcherStatusDomain", referenced from: ___43-[IonNetworkHelper makeRequest:requestPtr:]_block_invoke in libgvrunity.a(ionnetworkhelper.mm.o) "_OBJC_CLASS_$_GTMSessionFetcherService", referenced from: objc-class-ref in libgvrunity.a(ionnetworkhelper.mm.o)
Thank you in advance.