Accordion problem

Hi guys,
this is the page: https://www.bigbrothers.org.il/donate-now/
I implemented the accordion shortcode in the php file like so

 echo do_shortcode(
            '[su_accordion]' .
            ' [su_spoiler title="שלב ראשון" style="fancy"] Spoiler content [/su_spoiler]' .
            ' [su_spoiler title="שלב שני" style="fancy"] Spoiler content [/su_spoiler]' .
            ' [su_spoiler title="שלב שלישי" style="fancy"] Spoiler content [/su_spoiler]' .
            '[/su_accordion]'
			);
		?>

For some reason the acordion doesn’t open when clicked. any Idea how to fix it?