Error on page after submission

Hi,

Thanks for the great plugin, works great! I am having one issue with an error being thrown on the final page after submission for a multiple question survey:

Warning: Illegal offset type in /htdocs/www/wp-content/plugins/wp-survey-and-quiz-tool/lib/Wpsqt/Shortcode.php on line 750 Warning: Illegal offset type in /htdocs/www/wp-content/plugins/wp-survey-and-quiz-tool/lib/Wpsqt/Shortcode.php on line 750

750:

if (isset($cachedSections[$sectionKey]['questions'][$question['id']]['type']) && $cachedSections[$sectionKey]['questions'][$question['id']]['type'] != "Multiple" && isset($cachedSections[$sectionKey]['questions'][$question['id']]['answers'][$givenAnswer]["count"]))
					$cachedSections[$sectionKey]['questions'][$question['id']]['answers'][$givenAnswer]["count"]++;

The site is 3.4.2 and the plugin in 2.12.

Any help would be appreciated!

https://www.ads-software.com/extend/plugins/wp-survey-and-quiz-tool/