FYI - The TSP has expanded the number of funds available starting today, adding many new "Lifetime plans" 2025, 2035, 2045, 2055, 2065. They changed the price display as of yesterday showing zero for the new ones but as a result the retrieval scraper for the prices no longer works as of yesterday because the order is different with the new funds inserted.
I'm still using FM2016 so I realize it will no longer work for me with the new funds added, but I think the retrieval module will need updating for newer versions.