Fatal error apparently related to WP Quiz

Hi,

I love WP Quiz… a great plugin. But I seem to have a fatal error connected to it. Can anybody help me?

Thanks.

I have deactivated all plugins (changed name of folder) and the problem continues.

I’ve also tried the 20.20 theme.

Although the site works for the front end user, I can’t publish anything new or upload media.

Any help would be gratefully receieved.

Below are the details…

WordPress version 5.3.2
Current theme: CheerUp (version 4.0.0)
Current plugin: WP Quiz (version 2.0.5)
PHP version 7.3.13

Error Details
=============
An error of type E_ERROR was caused in line 43 of the file /homepages/8/d745777020/htdocs/app745777044/wp-content/plugins/wp-quiz/includes/Admin/MetaBoxes/QuizShortcodeMetaBox.php. Error message: Uncaught TypeError: Argument 1 passed to WPQuiz\Admin\MetaBoxes\QuizShortcodeMetaBox::render() must be an instance of WP_Post, instance of stdClass given, called in /homepages/8/d745777020/htdocs/app745777044/wp-includes/class-wp-hook.php on line 288 and defined in /homepages/8/d745777020/htdocs/app745777044/wp-content/plugins/wp-quiz/includes/Admin/MetaBoxes/QuizShortcodeMetaBox.php:43
Stack trace:
#0 /homepages/8/d745777020/htdocs/app745777044/wp-includes/class-wp-hook.php(288): WPQuiz\Admin\MetaBoxes\QuizShortcodeMetaBox->render(Object(stdClass))
#1 /homepages/8/d745777020/htdocs/app745777044/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(”, Array)
#2 /homepages/8/d745777020/htdocs/app745777044/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#3 /homepages/8/d745777020/htdocs/app745777044/wp-admin/edit-form-advanced.php(570): do_action(‘edit_form_after…’, Object(stdClass))
#4 /homepages/8/d745777020/htdocs/app745777044/wp-admin/post-new.php(75): include(‘/homepages/8/d7…’)
#5 {main}