Hi there! Great plugin, worked great until today! After the latest update, however, the frontend (both standard and bootstrap shortcodes) seem to be broken. The form loads just the first field (service), but the rest (worker, location, calendar) remain hidden. After checking the CSS, they stay with the property display: none. I guess it’s related to the js code (addClass disabled / removeClass disabled), but I don’t want to mess up with the code of the plugin.
I worked around a solution by forcing CSS display: block for the calendar and predefining worker and location through the shortcode. Still, this is something you’d like to debug ASAP.