Hello,
Thanks for your Patience and Apologies for the Inconvenience!
This occurs to properly adjust the Height of the Headers based on your Content. The current height of the Header is 100px. You can simply add the following code in the css/custom.css File:
[ch_pre type="css"].header-wrap-clone {
height: 100px;
}[/ch_pre]
This will fix the issue. You can change this value depending on the Final Height of the Header based on the content inside the Header. However, the JS Error is not related to Canvas Codes. It appears to be an issue with one of your Chrome Extensions.
Hope this Helps!
Let us know if we can help you with anything else or if you find any further issues.