Type E_ERROR

Hi Alex. Thanks for your help.
After installing the latest update, I got an error warning from wordpress and the following message.
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Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, Quiz Tool Pro by EduKit.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 5.4.1
Current theme: Basic_HMancuso-Astra (version 1.0.0)
Current plugin: Quiz Tool Pro by EduKit (version 3.0.1)
PHP version 7.1.14

Error Details
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An error of type E_ERROR was caused in line 222 of the file /home3/hmancuso/public_html/wp-content/plugins/quiz-tool-lite-master/admin/help.php. Error message: Uncaught Error: Class ‘qtl_utils’ not found in /home3/hmancuso/public_html/wp-content/plugins/quiz-tool-lite-master/admin/help.php:222
Stack trace:
#0 /home3/hmancuso/public_html/wp-content/plugins/quiz-tool-lite-master/functions.php(276): require_once()
#1 /home3/hmancuso/public_html/wp-includes/class-wp-hook.php(287): ekQuiz->drawHelpPage(”)
#2 /home3/hmancuso/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(”, Array)
#3 /home3/hmancuso/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#4 /home3/hmancuso/public_html/wp-admin/admin.php(254): do_action(‘ek_pot_page_ek-…’)
#5 /home3/hmancuso/public_html/wp-admin/edit.php(10): require_once(‘/home3/hmancuso…’)
#6 {main}
thrown

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Please let me know.
Humberto