Turn up your screen brightness so the kiosk can read your barcode.

iPhone: https://support.apple.com/en-us/HT202613#:~:text=Go%20to%20Settings%20%3E%20Display%20%26%20Brightness,left%20to%20adjust%20the%20brightness.
Android: https://www.androidcentral.com/how-adjust-screen-brightness-and-sleep-settings-android

Other Possible Fixes:

• Turn off the kiosk for 30 seconds and power back up.
• Make sure there are no updates in your SyncScan.Cloud dashboard. If there are updates, go ahead and update the kiosk.
• Kiosk still will not read wellness barcode/Aztech code/mobile ID? Let us know here: https://syncscan.zendesk.com/hc/en-us