That is not an error in Wordpress or any other code, it is an exception raised by JavaScript, telling you that the variable or object; technically, that you're trying to use in your code "
punchgs" doesn't exist; is undefined.
Re-check your code, and make sure you're having this variable defined, you're having a reference to the library that allows you to use this variable in your code, or the object is a built-in one; which can never be the case with this variable.
Please see this Mozilla Developer Network document for the
undefined[
^] term, you will find a lot of good support and answers from there. One more thing, please at least try to learn the programming basics before doing anything it would help you in overcoming the exceptions.
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