The NES Health app together with the Bluetooth/mobile scanner can only be used by clients of a BWS practitioner. If you see the attached error then this means your practitioner is using NES ProVision and is unable to accept remote scans from the NES Health app. The scan you have just attempted to do hasn't been saved. The green light indicates the scanner is fully charged, not that the scan was successful.
As a client, you will need to use BioSync to scan on your computer/mac by connecting the scanner to the computer/mac using the supplied USB cable. Instructions to download BioSync can be found in your welcome email or here: https://help.neshealth.com/hc/en-us/articles/360033472074-BioSync-Download-and-Remote-Scanning
As a practitioner, if you have clients that wish to use the NES Health app and Bluetooth/mobile scanner then please contact customer services to discuss converting to BWS.