How do I replicate a material from an object on the server to the corresponding object on the client?

Sorry for the late replay, Easter weekend and all…however, seem to have a multitude of them:

LogNetPackageMap:Warning: UPackageMapClient::SupportsObject /Game/Maps/UEDPIE_1_OnlineMap.OnlineMap:PersistentLevel.Obj_BP_C_13.MaterialInstanceDynamic_36 NOT Supported.Not RF_WasLoaded. NetGUID: <0>

Is this something I’m doing at all, tried to find out what it was but couldn’t find much info on it?