Appointment + does not let me book an appointment

Hi there

After the plugin update it seems to be impossible to book an appointment. Whenever I click on the slot I want to make a booking, the link seems inactive and nothing happens.

Was there a change in shortcode or is there any other reason, why this does not work anymore? It worked perfectly before the update of the plugin.

Original Post is here: https://premium.wpmudev.org/forums/topic/shortcode-worker-after-update-not-working

Thanks and best regards

Manuel