Kwayy HTML Sitemap permissions bug

We have this plugin installed on a multisite install of WordPress, but only activated on one site so far.

When a user who is not a multisite super-admin, and has a role of Editor tried to login after activating the plug, she saw a white screen and we found this error message in the log:

PHP Fatal error:  Call to undefined function get_current_user_role() in /home/wpbarnha/public_html/wp-content/plugins/kwayy-html-sitemap/kwayy-html-sitemap.php on line 103

Here is the code that is failing in your plugin file:

}elseif(is_multisite() && !is_super_admin()){
            $theRoles = get_option('global-admin-bar-roles');
            if(!is_array($theRoles)){$theRoles = array();}
            if(!in_array(get_current_user_role(),$theRoles)){
                        add_options_page( 'Kwayy HTML Sitemap Options', 'Kwayy HTML Sitemap Options','manage_options', 'kwayyhs', 'kwayyhs_page' );
                }

I think the function get_current_user_role ought to be defined by the time this is called, based on my limited knowledge of the load order, but it’s not.

As a temporary fix, we commented out the inner if-statement, so that the menu option always loads. That’s not a problem for this site, but it will be overwritten if the plugin is updated, and it’s not a long-term solution.

(We also have the s2Member Pro plugin installed, which may be causing a conflict.)

Can anyone shed any light on this issue?

https://www.ads-software.com/extend/plugins/kwayy-html-sitemap/