cannot pickle '_io.TextIOWrapper' object when trying to save graph

I have been running into the issue "ERROR in command []: cannot pickle '_io.TextIOWrapper' object" on the latest version of MavExplorer when saving a graph, however, this does not happen on older versions. I wish to dump my data to a CSV file, but the older version does not have the commands i need.

Start at MavExplorer's graph-saving flow and reproduce the error when saving a graph on the latest version. Compare that behavior with an older version, especially when using the CSV-related commands. Done means graph saving and dumping the data to CSV work without the TextIOWrapper pickling error.

Written by the indexing model from the issue text.