persistent error message in error log.

error] 1291606#1291606: *48948 FastCGI sent in stderr: "

PHP message: PHP Warning:  Attempt to read property "post_type" on null in /var/www/****PRIVATE***/htdocs/wp-content/plugins/tutor-lms-elementor-addons/classes/AddonsManager.php on line 43

PHP message: PHP Stack trace:

PHP message: PHP   1. {main}() /var/www/****PRIVATE***/htdocs/index.php:0PHP message: PHP   

2. require() /var/www/****PRIVATE***/htdocs/index.php:17PHP message: PHP   

3. require_once() /var/www/****PRIVATE***/htdocs/wp-blog-header.php:19PHP message: PHP   

4. include() /var/www/****PRIVATE***/htdocs/wp-includes/template-loader.php:106PHP message: PHP   5. get_header($name = *uninitialized*, $args = *uninitialized*) /var/www/****PRIVATE***/htdocs/wp-content/themes/hello-elementor/index.php:15PHP message: PHP   6. locate_template($template_names = [0 => 'header.php'], $load = TRUE, $load_once = TRUE, $args = []) /var/www/****PRIVATE***/htdocs/wp-includes/general-template.php:48

PHP message: PHP   7. load_template($_template_file = '/var/www/****PRIVATE***/htdocs/wp-content/themes/hello-elementor/header.php', $load_once = TRUE, $args = []) /var/www/****PRIVATE***/htdocs/wp-includes/template.php:720

PHP message: PHP   8. require_once() /var/www/****PRIVATE***/htdocs/wp-includes/template.php:785PHP message: PHP   9. wp_head() /var/www/****PRIVATE***/htdocs/wp-content/themes/hello-elementor/header.php:24

PHP message: PHP  10. do_action($hook_name = 'wp_head') /var/www/****PRIVATE***/htdocs/wp-includes/general-template.php:3053PHP message: PHP  11. WP_Hook->do_action($args = [0 => '']) /var/www/****PRIVATE***/htdocs/wp-includes/plugin.php:517

PHP message: PHP  12. WP_Hook->apply_filters($value = '', $args = [0 => '']) /var/www/****PRIVATE***/htdocs/wp-includes/class-wp-hook.php:334PHP message: PHP  13. wp_enqueue_scripts('') /var/www/****PRIVATE***/htdocs/wp-includes/class-wp-hook.php:310PHP message: PHP  14. do_action($hook_name = 'wp_enqueue_scripts') /var/www/****PRIVATE***/htdocs/wp-includes/script-loader.php:2225PH