Robocode Editor/Compiler troubles?
Hmm, I know I've seen those kinds of errors before, but beyond clearing robots/.data and robots/robot.database and rebuilding, I'm not sure what to try. Can you actually run (eg) XanderCat 12.0.1 or is the bot itself broken too?
Certainly no harm in trying a fresh Robocode install. I've probably got like a dozen. :-)