Not working on fairly new multisite installation

Several errors come up on installation. Some might be multisite issues, but at least two are coding issues. First, the plugin uses the deprecated get_currentuserinfo() function where it should use wp_get_current_user(). Not a show stopper, but if you have debug turned on, you’ll get a big warning message. Second, there is a $count++ line of code but $count is never defined. It looks left over after the developer changed a for loop to a foreach one. Last, when I try to create a new button, I get a 502 Bad Gateway error. On top of that, the plugin doesn’t exactly adhere to WordPress coding standards.

I like the idea of the plugin, but uninstalling it for now.