Thi is the message:
2019-03-27 08:51:28: Error running JavaScript: TypeError: window.setBackgroundColor is not a function. (In ‘window.setBackgroundColor(‘rgb(235, 235, 235)’)’, ‘window.setBackgroundColor’ is undefined)
2019-03-27 08:51:28: Error running JavaScript: ReferenceError: Can’t find variable: $