wp-poll and wp-quizz error in the front page after creating quizz item

Hi,

I have purchased the quizz addon plugin and installed along with poll. when i create a quizz or poll, it is creating error in the front page:

Fatal error: Uncaught Error: Call to a member function get_poll_type() on bool in C:\xampp\htdocs\kricketwicket\wp-content\plugins\wp-poll-quiz\includes\classes\class-hooks.php:113 Stack trace: #0 C:\xampp\htdocs\kricketwicket\wp-includes\class-wp-hook.php(288): WPPQUIZ_Hooks->display_quiz_question(‘\t\t<div data-ele…’) #1 C:\xampp\htdocs\kricketwicket\wp-includes\plugin.php(206): WP_Hook->apply_filters(‘\t\t<div data-ele…’, Array) #2 C:\xampp\htdocs\kricketwicket\wp-includes\post-template.php(253): apply_filters(‘the_content’, ‘<img width=”300…’) #3 C:\xampp\htdocs\kricketwicket\wp-content\themes\oceanwp\partials\page\article.php(15): the_content() #4 C:\xampp\htdocs\kricketwicket\wp-includes\template.php(724): require(‘C:\\xampp\\htdocs…’) #5 C:\xampp\htdocs\kricketwicket\wp-includes\template.php(671): load_template(‘C:\\xampp\\htdocs…’, false) #6 C:\xampp\htdocs\kricketwicket\wp-includes\general-template.php(168): locate_template(Array, true, false) #7 C:\xampp\htdocs\kricketwicket\wp-content\themes\oceanwp\p in C:\xampp\htdocs\kricketwicket\wp-content\plugins\wp-poll-quiz\includes\classes\class-hooks.php on line 113

I edited the C:\xampp\htdocs\kricketwicket\wp-content\plugins\wp-poll-quiz\includes\classes\class-hooks.php and commented the lines from 111 to 120 as:

// $poll = wpp_get_poll();
// if ( $poll->get_poll_type() == ‘quiz’ ) {
// ob_start();
// wpp_get_template( ‘single-question.php’ );
// return ob_get_clean();
// }

then the error disappears. What is the problem in this?

Should I keep these line for the smooth functioning of the plugin and if I do so how can I rectifiy the error?

please help me on this as soon as possible.

Thank you.
Shobin.