JS FAQ accordion doesn't expand

JS FAQ accordion doesn’t expand (from Github: https://github.com/EJ2KDJ/EJ2KDJ.github.io/blob/master/Faq.js)

Worked on first installation, but had to reinstall because I was trying to fix a modal popup problem. Did not work properly after re-installation.

Here’s the FAQ page: https://ej2kdj.github.io/Faq.html

Thanks in advance for any help

Look in the console.

Uncaught SyntaxError: Unexpected token ‘:’ Faq.js:6

const accordionItemBody = accordionItemHeader.nextElementSibling:

Thanks for your help! It works now!