User membership error with Lms and Pmpro

Hello,
We are using the lms plugin and when we raise the pmpro membership level on the wp-admin/user-edit.php page and press the save button, the lms pages below give an error.
How can we handle this?

Error messages:

Fatal error: Uncaught Error: Attempt to assign property “course_number” on bool in /home/site/public_html/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/subscriptions.php:240 Stack trace: #0 /home/site/public_html/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/subscriptions.php(478): STM_LMS_Subscriptions::user_subscriptions(true, 1878) #1 /home/site/public_html/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/subscriptions.php(472): STM_LMS_Subscriptions::remove_overquoted(1878) #2 /home/ site/public_html/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/subscriptions.php(563): STM_LMS_Subscriptions::check_user_subscription_courses(1878, NULL) #3 /home/site/public_html /wp-includes/class-wp-hook.php(308): STM_LMS_Subscriptions::before_subscription_change(‘6’, 1878, Array, NULL) #4 /home/site/public_html/wp-includes/class-wp-hook. php(332): WP_Hook->apply_filters( ”, Array) #5 /home/site/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #6 /home/site/public_html/wp-content/plugins/paid-memberships -pro/includes/functions.php(1060): do_action(‘pmpro_before_ch…’, ‘6’, 1878, Array, NULL) #7 /home/site/public_html/wp-content/plugins/paid-memberships- pro/includes/profile.php(303): pmpro_changeMembershipLevel(‘6’, 1878, ‘admin_changed’) #8 /home/site/public_html/wp-includes/class-wp-hook.php(308): pmpro_membership_level_profile_fields_update(1878 ) #9 /home/site/public_html/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array) #10 /home/site/public_html/wp-includes/plugin.php (517): WP_Hook->do_action(Array) #11 /home/site/public_html/wp-admin/user-edit.php(155): do_action(‘edit_user_profi…’, 1878) #12 {main} thrown in /home/site/public_html/wp-content/plugins/masterstudy-lms-learning-management-system/_core/lms/classes/subscriptions.php on line 240

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