Menu not expanding

I was hoping to quickly add this plugin to our site, but it seems it won’t open the accordion items. I have the shortcode added on this test page:

https://wilmatheater.org/10387-2/Password: 60417e646fc4c

Ultimately, this accordion will want to live on this event post:
https://wilmatheater.org/event/fete-2021/
I tried it first on the event post, but all the accordions were the yellow hover color. None would open.

I was told to replace the code at line number 52 with the following code:

onclick=”scroll_to(<?php echo $i; ?>)” <?php } ?> role=”button” <?php echo $collapsed; ?> data-toggle=”collapse” data-parent=”#<?php echo $data_parent; ?>” data-target=”#collapse_<?php echo $post_id; ?>_<?php echo $i; ?>” href=”JavaScript:void(0);” aria-expanded=”true” aria-controls=”collapse_<?php echo $post_id; ?>_<?php echo $i; ?>”>

Can you help me? What is the syntax error in the code?