The code I've been told to inject into my header includes several "&&" which Squarespace is not reading properly… What am I doing wrong?
This is what I’m being told to copy and paste:

And this is the result:

Best answer by stephanie
After looking at squares space documentation, it looks like you can add custom code blocks to target specific areas in your website.
I am not familiar with squares space but as a testing step to see if it is working, you might be able to call something like this in the footer injection code section.
<script> mixpanel.track("Viewed Website");</script>
Then load your page and see if this sends an event to Mixpanel via the live view report.