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TroubleshootingGym owners & staff

A client can't book a session

Most booking problems are no credits, an unsigned waiver, Premium-only or full time, or your plan's client limit; work through the checks in order.

2 min readUpdated November 3, 2026

This article helps you find why a client can't book. The most common causes are no session credits, an unsigned waiver, time that is Premium only or full, or your plan's client limit blocking new sign-ups. Ask the client for the exact message they see, then work down the checks.

Warning: Booking a client in yourself skips the waiver check and can result in someone training without a signed waiver. Always confirm the waiver on their profile first.

Before you begin#

  • Ask the client which session they tried to book and the message they saw.
  • Open their profile from Clients.

Troubleshooting#

  • Does the client see You need 1 session credit to book this — you have 0?
    • Yes
      They need to buy a pack, membership or single session. If they've paid you another way, add credits under Credit balance → Adjust (+/−).
    • No
      Continue.
  • Does their profile say They can't book online until they sign under Waiver?
  • Does the client see That slot no longer exists, or can't see the time at all?
    • Yes
      The time may be Premium only, Unavailable (private), or deleted. Open the block on Calendar to check.
    • No
      Continue.
  • Does the client see That slot just filled up or There aren't that many spots left?
    • Yes
      The block is full. Increase Spots or open another time.
    • No
      Continue.
  • Does the client see You already have a session booked at that time?
    • Yes
      They have another booking that overlaps. They need to cancel it first.
    • No
      Continue.
  • Is the client new and can't create an account?
    • Yes
      If they see that your gym isn't taking new online sign-ups, you've hit your plan's client limit. Check Usage on Billing, then upgrade or deactivate inactive clients.
    • No
      Continue.
  • Can't the client buy credits because your gym hasn't switched on online payments?
  • Has your site gone offline?
    • Yes
      Your trial or plan has lapsed. Choose a plan on Billing.
    • No
      Contact support from levflex.com/help with the client's email and the exact message.

Common mistakes#

Opening time in the wrong week#

Check you added the block to the right week with This Week, Next Week and In 2 Weeks.

Leaving Premium only ticked#

Standard clients can't see Premium-only time, so it looks like there's nothing to book.

Forgetting guests need credits#

Each guest takes a seat and a credit. A client with 1 credit can't book themselves plus a guest.

Once fixed, the client can book straight away on your site, in the portal or in the Levflex app.

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The assistant answers from these articles and can check refunds and credits on your Levflex plan. If it can't solve it, it hands the conversation to our team.

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A client can't book a session · Levflex Help