GetErrors().ToString() does not work

[rnugent3]

In HEC-FDA, we attempt to get the errors as strings for reporting to the user:

https://github.com/HydrologicEngineeringCenter/HEC-FDA/blob/3864be35608229ff5596b2ad1e910ecfc24e38b7/fda-model/compute/ImpactAreaScenarioSimulation.cs#L1174

This produces the string in the image: