Unable to fetch large json data

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ArgumentOutOfRangeException: Non-negative number required.
Parameter name: count
System.Buffer.BlockCopy (System.Array src, System.Int32 srcOffset, System.Array dst, System.Int32 dstOffset, System.Int32 count) (at :0)
ExitGames.Client.Photon.StreamBuffer.Read (System.Byte[] buffer, System.Int32 offset, System.Int32 count) (at <5bac2b0d73684de1adac4ad02bdde90d>:0)
ExitGames.Client.Photon.Protocol16.DeserializeString (ExitGames.Client.Photon.StreamBuffer din) (at <5bac2b0d73684de1adac4ad02bdde90d>:0)
ExitGames.Client.Photon.Protocol16.Deserialize (ExitGames.Client.Photon.StreamBuffer din, System.Byte type) (at <5bac2b0d73684de1adac4ad02bdde90d>:0)
ExitGames.Client.Photon.Protocol16.DeserializeParameterTable (ExitGames.Client.Photon.StreamBuffer stream) (at <5bac2b0d73684de1adac4ad02bdde90d>:0)
ExitGames.Client.Photon.Protocol16.DeserializeOperationResponse (ExitGames.Client.Photon.StreamBuffer stream) (at <5bac2b0d73684de1adac4ad02bdde90d>:0)
ExitGames.Client.Photon.PeerBase.DeserializeMessageAndCallback (System.Byte[] inBuff) (at <5bac2b0d73684de1adac4ad02bdde90d>:0)
ExitGames.Client.Photon.TPeer.DispatchIncomingCommands () (at <5bac2b0d73684de1adac4ad02bdde90d>:0)
ExitGames.Client.Photon.PhotonPeer.DispatchIncomingCommands () (at <5bac2b0d73684de1adac4ad02bdde90d>:0)
PhotonHandler.Update () (at Assets/Plugins/Photon Unity Networking/Plugins/PhotonNetwork/PhotonHandler.cs:158)

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