TroubleshootingMembers
I can't book a session
Match the message you see when booking fails to its fix, whether it's credits, a waiver, a full slot, a time clash or payments that aren't switched on.
3 min readUpdated November 3, 2026
When a booking can't go through, the portal or app shows a message saying why. Nothing is charged and no credit is used when a booking fails. Find your message below and follow the fix. Most problems are solved by buying a credit, signing the waiver or choosing another time.
Warning: Buying extra credits to get past an error that isn't about credits can result in credits you don't need. Always read the message first, because a waiver, a full slot or a time clash can't be fixed by buying more.
Before you begin#
- Note the exact message on screen.
- Check your credit balance on the portal or the app's Home tab.
- Make sure you're signed in at the right gym.
Steps#
- Read the message on screen.
- Find it in the table below.
- Follow the fix, then try the booking again.
What each message means#
| Message | Cause | Fix |
|---|---|---|
| You don't have a session credit yet or You need [number] session credits | Not enough credits | Select Buy sessions. See How to buy a pack or a single session |
| A waiver message with Read & sign | Your gym needs a signed waiver first | See How to sign your gym's waiver |
| This session just filled up or Full | Someone booked the last spot | Pick another time |
| There aren't that many spots left | Not enough room for your guests | Choose fewer guests |
| You already have a session booked at this time | It overlaps another booking | Cancel the other one first, or pick another time |
| You're already booked into this session | You already hold a spot | Nothing to do. It's on your overview |
| This session has already started | The time has passed | Pick a later time |
| That time is reserved for premium clients | A premium-only time | Pick a standard time |
| Online payments aren't switched on yet or This gym isn't taking payments in the app yet | Your gym hasn't finished setting up card payments | Ask your gym about paying in person |
Common mistakes#
Booking straight after paying#
Credits are added once your payment is confirmed, which usually takes a few seconds. If the app says Payment processing, wait until it clears, then book. You can leave the screen while it finishes.
Signing the waiver in the wrong place#
In the app, the waiver opens in your browser. After you sign, you'll see All set. Head back to the app to book. Return to the app and try the booking again.
Being signed in at another gym#
Credits belong to one gym. If your balance shows 0 but you bought credits, check the gym name at the top of the screen.
Troubleshooting#
- Did you just buy credits but your balance is still 0?
- YesWait 1 minute and refresh. If the purchase shows Pending in your purchase history after 10 minutes, contact your gym.
- NoGo to the next question.
- Yes
- Is the error about the gym, like payments not switched on?
- YesOnly your gym can fix this. Send it a request from Messages in the portal, or use Contact the gym in the app. See How to contact your gym.
- NoFollow the fix in the table, then see How to book a session.
- Yes
If none of these match, sign out and back in, then try again. If it still fails, contact your gym with the message you saw.
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Related articles
- How-toHow to book a sessionPick an open time on the Book page or Book tab and confirm it. Each spot uses 1 session credit, taken when you book.Read
- TroubleshootingWhy I'm not seeing open sessionsAn empty schedule usually means a trainer filter is on, you're looking past what the gym has published, or the open times are full or premium-only.Read
- How-toHow to sign your gym's waiverMany gyms need a signed waiver before your first booking. Select Read & sign, choose who it's for, agree to electronic signing, type your full legal name and select Sign waiver.Read
- How-toHow to buy a pack or a single sessionBuy a single session or a pack on Payments (web) or Wallet (app). You pay with Stripe in your browser, and credits arrive within seconds.Read
- ExplainerHow session credits workA session credit books one spot. Credits come from packs, memberships, referrals and returned cancellations, and Levflex doesn't expire them.Read
Still need help?
Ask the assistant, or get in touch with your gym
The assistant answers questions about booking, credits and the app any time. Prices, refunds and cancellation rules belong to your gym, so message them from the portal.