メモ：エラー内容（＾＾
Failed to Instantiate prefab: . Verify the Prefab is in a Resources folder (and not in a subfolder)
UnityEngine.Debug:LogError(Object)
PhotonNetwork:Instantiate(String, Vector3, Quaternion, Byte, Object[]) (at Assets/Photon Unity Networking/Plugins/PhotonNetwork/PhotonNetwork.cs:2497)
PhotonNetwork:Instantiate(String, Vector3, Quaternion, Byte) (at Assets/Photon Unity Networking/Plugins/PhotonNetwork/PhotonNetwork.cs:2464)
アイテムスロット置く:頭装備(Int32) (at Assets/スクリプト/ＭＭＯスクリプト/UI/アイテムスロット置く.cs:337)
System.Reflection.MethodBase:Invoke(Object, Object[])
NetworkingPeer:ExecuteRpc(Hashtable, Int32) (at Assets/Photon Unity Networking/Plugins/PhotonNetwork/NetworkingPeer.cs:3007)
NetworkingPeer:OnEvent(EventData) (at Assets/Photon Unity Networking/Plugins/PhotonNetwork/NetworkingPeer.cs:2601)
ExitGames.Client.Photon.PeerBase:DeserializeMessageAndCallback(Byte[])
ExitGames.Client.Photon.EnetPeer:DispatchIncomingCommands()
ExitGames.Client.Photon.PhotonPeer:DispatchIncomingCommands()
PhotonHandler:Update() (at Assets/Photon Unity Networking/Plugins/PhotonNetwork/PhotonHandler.cs:158)