Yeah I have found in the forum this topic:
Seems to be the same problem:
Caught exception while deserializing data.
System.NotSupportedException: This operation is not supported.
at System.IO.Compression.DeflateStream.get_Position()
at Pathfinding.Serialization.AstarSerializer.DeserializeNodeReferenceMap()
at Pathfinding.Serialization.AstarSerializer.DeserializeExtraInfo()
at Pathfinding.AstarData.DeserializeGraphsPartAdditive(AstarSerializer sr)
at Pathfinding.AstarData.DeserializeGraphsAdditive(Byte bytes)