Values set as NaN

Downloaded release 0.10.7.1-2.4.x If I "apply all transplants at once" and a slave dies as a result, I receive the following message:

ERROR: The following variables are NaN! Please report this. $averageTrust $averageDevotion $enduringTrust $enduringDevotion

Here are two save files.

426 Weeks - Bugged free-cities-20190611-063847_Bugged.save

401 Weeks - Earlier Save, Not Bugged free-cities-20190611-063931_Unbugged.save

Thank you for your time.