Uncaught TypeError: Cannot read property 'open' of undefined

Hi there,  I am getting a Uncaught TypeError: Cannot read property 'open' of undefined error, on Line 14. This is a function, that will open a popup on page load.  Not sure hoe to rectify it?

jQuery(document).ready(function($) {
	// Parse the URL
	function getParameterByName(name) {
	    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
	    var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
	        results = regex.exec(location.search);
	    return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
	}
	// Give the URL parameters variable names
	var access = getParameterByName('access');
 
	// if access does not = yes then display the popup
	if (access != 'yes') {
		$.magnificPopup.open({
		  items: {
		    src: 'https://go.buildertrend.com/l/464372/2020-03-20/7sshdx'
		  },
		  type: 'iframe', modal: true
		});
	}
});

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