I hadn't played the game in a while, came back a few days ago and started playing. I seen there was an update like 9 hours ago and downloaded it. Now am experiencing this window semi frequently.

I'll edit on what actions cause the errors as I find them

Edit 1: basically, any option in the slave training menu causes the (on base: 'Nil')

Edit 2: the "Nil" error also happens on ANY time advancement

am a total goof and just realized the "hide errors" button, but still want to know, will these errors effect the gameplay in the future?