Conflict with Nav Menu Roles Plugin

Having both plugins active causes all admin pages to have a debug message at top, ” Warning: Invalid argument supplied for foreach() in /srv/www/site.dev/current/web/app/plugins/nav-menu-roles/nav-menu-roles.php on line 209

I have cross-posted this issue to the other plugin support forum – https://wordpress.org/support/topic/conflict-with-wp-notification-centre

https://wordpress.org/plugins/wp-notification-center/