If you have a GFCC at a location with no population, and assign it a ground force construction task, the game throws an error immediately plus every turn thereafter, or if you click on the colony in the colony list, about dividing by zero. Additionally, it does not display the build order on the GU training tab, probably because the bug happens while creating the text. I suspect this is because it's trying to calculate the build time, and since you have zero pop but demand for 1M workers, your production efficiency is zero. Classic divide by zero error. The error persists even if you delete or move the GFCC.
Error message is: "2.0.2 Function #2186: Attempt to divide by zero."
Obviously from the message I'm using 2.0.2, but have not seen a bug fix for this listed since then.
Update: If you use SM to set the population to 1 instead of 0, the bug goes away and the GU training tab now shows the ground unit build order. Deleted the build order and setting the pop back to zero, and the bug stays gone, so I can confirm this is caused by establishing a ground unit build order on a pop with zero population due to efficiency of zero causing divide by zero error.