On lesson 18. Introduction to For Loops, on the first practice problem, "Using a For Loop to Move To the End Of The Board", I get this weird error that doesn't seem to make sense, and even the program itself says "Sorry, we don't have this particular error message covered yet!"

On lesson 18. Introduction to For Loops, on the first practice problem, "Using a For Loop to Move To the End Of The Board", I get this weird error that doesn't seem to make sense, and even the program itself says "Sorry, we don't have this particular error message covered yet!"