A bug caused the widget forms table to be deleted upon resource deletion.
[26/11/2018, 17:45 EST] Fixed.
[26/11/2018, 16:50 EST] Expected time of resolution: Within one hour.
[26/11/2018, 16:30 EST] Data recovering in progress. Custom fields won't be stored in the database for all appointments booked since the error occurred.
[26/11/2018, 12:30 EST] We've identified the cause of the error, still working on its resolution.
[26/11/2018, 10:00 EST] In the scheduling tool, the custom fields are currently not displayed during the booking process, nor are they available via API.