Hello @cryptolabs and @kylemaccs
I’ve updated the plugin and added the flag option. The version is stable with the latest version of WordPress, and you can update the plugin to v1.3.
And as per the concern of error in the shortcode, It is due to the issue of encoding of the double/single quote you are copying directly from the WordPress installation section.
Instead of copying the shortcode from the plugin page, please write it on your own using your keyboard, and the plugin will work perfectly for you.
Let me know if you still have an issue with the plugin.