Try performing any of the following actions:

• If the screen of a device turns off, press the Escape key on the BlackBerry® device.
• If there is a glare on the screen of the device that is displaying the invitation barcode, you might need to move the device away from the object that is causing the glare.
• Set the device that is displaying the invitation barcode on a flat, level surface. Move the other device about 4 in. (10 cm) above the first device until all four corners of the barcode appear on the screen of the device that is scanning the barcode.