Invalid argument

The plugin was working fine and the FAQ accordion was showing correctly on the frontend and then these two warnings are showing on the page and the FAQ is gone.

Warning: count(): Parameter must be an array or an object that implements Countable in /home1/buckeye/public_html/warrendev/wp-content/plugins/responsive-accordion-and-collapse/front/ac-content.php on line 11

Warning: Invalid argument supplied for foreach() in /home1/buckeye/public_html/warrendev/wp-content/plugins/responsive-accordion-and-collapse/front/ac-content.php on line 56

Thank you for your assistance with this.

The page I need help with: [log in to see the link]