I've moved this thread to RGSSx Script Support (this is not a request). Please be sure to post your threads in the correct forum next time. Thank you.
although I suspect it really belongs in Ace Support, as I don't think it's an error with the scripts, but with your events.
If you read the error, you'll see it says Game_Interpreter.
That means, unless you have added scripts that add more content to the Game_Interpreter class, the error is in one of your events somewhere.
I don't have Ace in front of me so I can't tell you what the likely cause is. But if you look at the Game Interpreter script and go to line 1414 (that's kind of hinted at, by the message saying "Game_Interpreter line 1414"), it might give you an idea.