Wordpress [Gravity Forms – Signature Add-On] Signature box not working, “Uncaught type error”? -
<p>I'm using Gravity Forms on my (Wordpress) website for some simple forms, and have installed the signature add-on to require people to sign their name before being able to submit the form. </p>

<p>At first everything was working perfectly, but at some point in the last few months (possibly after switching hosts), the signature add-on function stopped working. </p>

<p>You're supposed to be able to draw in the signature box (to sign your name), when you hover over the box the mouse turns into a pen tool. The mouse still turns into a pen, but now the box is not interactive - clicking and dragging does not produce any marks.  </p>

<p>Using inspect element on the page, I can see the following error message: 
<code>
Uncaught TypeError: $ is not a function</code></p>

<p>This error does not appear on pages without the signature add-on. Here is a page featuring a form with the add-on at the top: </p>

<p><a href="http://northeastpcg.com/test-for-forms/" rel="nofollow">http://northeastpcg.com/test-for-forms/</a></p>

<p>Does anyone have any insight as to what the problem might be? Any help is greatly appreciated, thank you! </p>