incomplete values error in time slot reservation

Why is this appearing on our clients' reservation? Can you help us identify the problem and how to address it? We appreciate your immediate response.

Thank you.

Hello - Apologies for the inconvenience.

I checked your most recent form but can't seem to locate an appointment slot widget in it. Are you perhaps referring to a different form? Kindly share its URL so we can check.

Guide: Where-to-Find-My-Form-URL

Also, the screenshot you sent is a bit tiny and unreadable. Would it be possible for you to re-send it in a bigger size?

Guide: How-to-Post-Screenshots-to-Our-Support-Forum

Looking forward to your reply.