Plugin causes PHP error and breaks site

undefined constant QUADMENU_OPTIONS – assumed ‘QUADMENU_OPTIONS’ (this will throw an Error in a future version of PHP) in C:\Users\micro\Google Drive\htdocs\JD-Garage\app\public\wp-content\plugins\quadmenu-divi\quadmenu-divi.php on line 107
Call Stack
# Time Memory Function Location
1 0.0008 427432 {main}( ) …\plugins.php:0
2 0.0009 434312 require_once( ‘C:\Users\micro\Google Drive\htdocs\JD-Garage\app\public\wp-admin\admin.php’ ) …\plugins.php:10
3 0.0010 434952 require_once( ‘C:\Users\micro\Google Drive\htdocs\JD-Garage\app\public\wp-load.php’ ) …\admin.php:34
4 0.0011 435392 require_once( ‘C:\Users\micro\Google Drive\htdocs\JD-Garage\app\public\wp-config.php’ ) …\wp-load.php:37
5 0.0012 440072 require_once( ‘C:\Users\micro\Google Drive\htdocs\JD-Garage\app\public\wp-settings.php’ ) …\wp-config.php:77
6 0.1078 3448384 do_action( ) …\wp-settings.php:557
7 0.1078 3448760 WP_Hook->do_action( ) …\plugin.php:484
8 0.1078 3448760 WP_Hook->apply_filters( ) …\class-wp-hook.php:311
9 0.1078 3450208 QuadMenu_Divi->hooks( ) …\class-wp-hook.php:287