Script Organizer 3.8.3 probelm

Script Organizer 3.8.3 causes a fatal error. 
(Please don’t try to activate it on our site.)

An error of type E_ERROR was caused in line 204 of the file /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-content/plugins/scripts-organizer/admin/admin.php. Error message: Uncaught Error: Call to undefined function is_plugin_active() in /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-content/plugins/scripts-organizer/admin/admin.php:204
Stack trace:
#0 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-includes/class-wp-hook.php(324): SCORG_admin->restrict_metabox_aio_extensions()
#1 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters()
#2 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-content/plugins/scripts-organizer/plugins/meta-box-aio/src/Settings.php(454): apply_filters()
#3 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-content/plugins/scripts-organizer/plugins/meta-box-aio/src/Settings.php(44): MBAIOSettings->get_extensions()
#4 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-content/plugins/scripts-organizer/plugins/meta-box-aio/src/Settings.php(11): MBAIOSettings->auto_activate_extensions()
#5 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-content/plugins/scripts-organizer/plugins/meta-box-aio/meta-box-aio.php(40): MBAIOSettings->__construct()
#6 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-content/plugins/scripts-organizer/admin/admin.php(218): require_once(‘…’)
#7 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-includes/class-wp-hook.php(324): SCORG_admin->conditionally_load_metabox_aio()
#8 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#9 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()
#10 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-settings.php(559): do_action()
#11 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-config.php(105): require_once(‘…’)
#12 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-load.php(50): require_once(‘…’)
#13 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-admin/admin.php(34): require_once(‘…’)
#14 /home/gigGA2ewh5PyzwFN/hoken411/public_html/wp-admin/update-core.php(10): require_once(‘…’)
#15 {main}
  thrown