DllNotFoundException: FirebaseCppApp-11_3_0 assembly:<unknown assembly> type:<unknown type> member:(null)

DllNotFoundException: FirebaseCppApp-11_3_0 assembly: type: member:(null)
at (wrapper managed-to-native) Firebase.AppUtilPINVOKE+SWIGExceptionHelper.SWIGRegisterExceptionCallbacks_AppUtil(Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate,Firebase.AppUtilPINVOKE/SWIGExceptionHelper/ExceptionDelegate)
at Firebase.AppUtilPINVOKE+SWIGExceptionHelper..cctor () [0x000ef] in :0
Rethrow as TypeInitializationException: The type initializer for 'SWIGExceptionHelper' threw an exception.
at (wrapper managed-to-native) System.Object.__icall_wrapper_mono_generic_class_init(intptr)
at Firebase.AppUtilPINVOKE..cctor () [0x00000] in :0
Rethrow as TypeInitializationException: The type initializer for 'Firebase.AppUtilPINVOKE' threw an exception.
at Firebase.AppUtil.SetLogFunction (Firebase.LogUtil+LogMessageDelegate arg0) [0x00001] in :0
at Firebase.LogUtil..ctor () [0x0000f] in :0
at Firebase.LogUtil..cctor () [0x00011] in :0
Rethrow as TypeInitializationException: The type initializer for 'Firebase.LogUtil' threw an exception.
at Firebase.FirebaseApp..cctor () [0x00051] in :0
Rethrow as TypeInitializationException: The type initializer for 'Firebase.FirebaseApp' threw an exception.
at RegisterManager.Start () [0x00000] in :0