Cannot read property 'firstchild' of null

Hello, Thank you for contacting us about how to fix the Uncaught TypeError: Cannot read property 'firstChild' of null error. I would be interested to know where you see the error or what behavior activates the error. However, from researching the error itself it appears to a be Javascript error. I found more information about the error here and a possible solution for you. However, if you need further assistance feel free to provide more information about your application or any data you have about how you came across that error. Best, Christopher Maiorana