Fatal error: Uncaught Error: Class "ActionScheduler_Abstract_Schedule" not found in /htdocs/wp-content/plugins/userfeedback-lite/includes/lib/action-scheduler/classes/abstracts/ActionScheduler_Abstract_RecurringSchedule.php:6
Stack trace:
#0 /htdocs/wp-content/plugins/userfeedback-lite/includes/lib/action-scheduler/classes/abstracts/ActionScheduler.php(164): include()
#1 /htdocs/wp-content/plugins/userfeedback-lite/includes/lib/action-scheduler/classes/schedules/ActionScheduler_IntervalSchedule.php(6): ActionScheduler::autoload('ActionScheduler...')
#2 /htdocs/wp-content/plugins/userfeedback-lite/includes/lib/action-scheduler/classes/abstracts/ActionScheduler.php(164): include('/htdocs/wp-cont...')
#3 [internal function]: ActionScheduler::autoload('ActionScheduler...')
#4 /htdocs/wp-content/plugins/userfeedback-lite/includes/lib/action-scheduler/classes/data-stores/ActionScheduler_DBStore.php(397): unserialize('O:32:"ActionSch...')
#5 /htdocs/wp-content/plugins/userfeedback-lite/includes/lib/action-scheduler/classes/data-stores/ActionScheduler_DBStore.php(368): ActionScheduler_DBStore->make_action_from_db_record(Object(stdClass))
#6 /htdocs/wp-content/plugins/userfeedback-lite/includes/lib/action-scheduler/functions.php(374): ActionScheduler_DBStore->fetch_action(57665)
#7 /htdocs/wp-content/plugins/all-in-one-seo-pack/app/Common/Admin/Usage.php(70): as_next_scheduled_action('aioseo_send_usa...')
#8 /htdocs/wp-includes/class-wp-hook.php(341): AIOSEO\Plugin\Common\Admin\Usage->init('')
#9 /htdocs/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters(NULL, Array)
#10 /htdocs/wp-includes/plugin.php(522): WP_Hook->do_action(Array)
#11 /htdocs/wp-settings.php(742): do_action('init')
#12 /htdocs/wp-config.php(94): require_once('/htdocs/wp-sett...')
#13 /htdocs/wp-load.php(50): require_once('/htdocs/wp-conf...')
#14 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...')
#15 /htdocs/index.php(17): require('/htdocs/wp-blog...')
#16 {main}
thrown in /htdocs/wp-content/plugins/userfeedback-lite/includes/lib/action-scheduler/classes/abstracts/ActionScheduler_Abstract_RecurringSchedule.php on line 6