Overview
For coaches and helpers using the Scanner App
If you see Invalid Token, use the steps for the action you were trying to complete: joining a coach’s session or uploading scans already stored on your device.
Do not uninstall the Scanner App while you have unsynced scans. Removing the app can erase sessions stored on that device.
If the error appears while joining a session
Ask the coach for the join QR code from the active session. The error message indicates that the code’s token is invalid or expired.
On the coach’s device, open the active scanning session and select Join QR.
On the helper’s device, use Join Live Session from the login screen or Join An Ongoing Activity if already signed in.
With Wi-Fi or cellular data connected, scan the code currently displayed on the coach’s device.
See Add another device to a scanning session for the full workflow.
If the error appears while uploading scans
Keep the scans on the same device and connect it to Wi-Fi or cellular data.
Close and reopen the Scanner App. If you recorded the session while signed in, sign back in to the same account.
Open See Log History. For a session joined without signing in, use the link on the login screen. For a signed-in session, select your club and use the log history available there.
Find the session marked Pending and select Resubmit.
Confirm that its status changes to Uploaded.
See How to resubmit failed scans for the log-history paths.
If the error continues
Review how to update the Scanner App and your device. Keep the app installed if scans are waiting to upload. Contact Marathon Kids support with the error message, device type, and the action that triggered it.
Frequently asked questions
Does Invalid Token mean my scans were deleted?
The message alone does not establish that scans were deleted. Check See Log History on the device that recorded them and use the same account or sign-in state as the original session.
Should I reinstall the app?
No. Do not uninstall it while you have scans waiting to upload.