Looks like we were using the wrong function to pull in the site address to those crumbs. As a temporary fix (which will be rolled permanently into the next release), please change lines 301 & 309 in HAG_Crumb.php (in the plugin directory) from site_url() to home_url()
That should make the links point to the right location! Let me know if you have any other issues. I’ll hold off closing this until I hear back from you.