Need Help With GoHighLevel Schedule Appointment Integration

Hello, I am trying to use an integration with GoHighLevel that you have. The Schedule Appointment integration. Most of the configuration fields have drop down (Account, Calendar, and Timezone), but Schedule Time field does not have drop down selection. I've tried manually entering dates, times, datetimes for testing purposes and no matter what I enter, it fails and does not show any reason why it fails. There is no guidance in your documentation on how to use this. The video available in your documentation is outdated. Could use help on this.