Free Constructors are broken

Whenever I get a free constructor (from anomalies, events, and techs), I get this. I'm not sure what it is, but it definitely doesn't construct anything.

I have a custom civ and a lot of mods (all from the official mod site). I'm not sure if there's a file somewhere that lists all the mods I'm currently using. I didn't have this problem until megastructures came out.

Thanks!