Run these checks in order
- Open the appointment service and confirm online booking is enabled.
- Check the service's availability limits for the affected date, weekday and time.
- Confirm an assigned staff member is working at that time and has not been blocked or changed for that day.
- Confirm the staff location matches the service location.
- Check required rooms or equipment and any blocked resource time.
- Check existing Wix bookings and events synced from personal calendars.
- Make sure the service duration and buffer finish before staff and service availability end.
- Check the appointment slot interval and the service's early/late booking window.
- Use Preview Availability, then run one live-site test for the same service, staff and date.
The most easily missed cause
A start time can look free while the full appointment does not fit. If a two-hour service is offered by someone working until 6pm, Wix will not show a 5pm start. Buffers can remove a slot for the same reason.
Change one input at a time
Do not widen business hours, staff hours and service limits together. That may restore the slot without revealing the cause. Change one constraint, refresh Preview Availability, and record the result.
This is a native Wix diagnostic
The correct fix is to identify the Wix constraint suppressing the slot. No current product from The Fox's Cache belongs in this diagnostic.
Use native Wix when
- A time is missing from the live appointment calendar.
- Preview Availability differs from what you expected.
- A staff member or location appears unavailable.
Evidence used for this answer
Every material conclusion should lead back to an official source, a firsthand check or both.
The factors Wix uses to calculate appointment availability and the official troubleshooting checks.
Vendor documentationLimit Service AvailabilityWix Help Center · checked 2026-08-28Native service-level date, day and time limits for appointment services.
Developer documentationWix Bookings architectureWix Developers · checked 2026-08-28The service types and constraints used by Wix Bookings to determine available time slots.