The important thing is have a jQuery version compatible with OnTrust. It does not matter where it comes from.
Did you try to inspect the page content (Right button of the mouse> Inspect)?
A good thing would be to share the site here, so we can look at it together.
Try this one that does not rely on jQuery. Paste this code into your document's <head> tag.
<!--Cookie Conset CSS-->
<link rel="stylesheet" type="text/css" href="//cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.0.3/cookieconsent.min.css" />
<!--Cookie Consent JS-->
//Invoke Cookie Consent on page load
yes the load | run order for code in Muse is [page head] then [page body] then [Master] head and [Master] body so for times when you need an order to things... like a popup timer you can split the code into different areas to have them run at different (but sequential) times
p.s, remember this bootstrap demo Nancy?