On the scan page, before scanning
Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given in /Applications/XAMPP/xamppfiles/htdocs/wordpress/wp-content/plugins/wordfence/lib/wfLog.php on line 631
That was the only visible error I found on all the wf pages, however when I clicked scan an error popped up that the tables were missing. That is related to this issue:
Perhaps in your registration hook you can check to ensure the tables have been created and if not display a message and disable the plugin?