Uncaught TypeError: Cannot read property ‘indexOf’ of undefined

Plugin version: 2.9.2
wp version: 5.7.2

Error shows in browser console on “My Account” pages

Uncaught TypeError: Cannot read property ‘indexOf’ of undefined

<script id='jquery-js-after'>
jQuery( function( $ ) {
	$('a').each(function(e){
		// for lack of specific classes on the my account action buttons we check the url
		if( $(this).attr('href').indexOf('generate_wpo_wcpdf') != -1 ){
			$(this).attr('target', '_blank');
		};
	});
});
</script>