Regarding Bill Print From Mobile Client

Dear All,
I have an issue with mobile print. I have done the mobile client setup as per the below tutorial.
https://kb.sambapos.com/en/8-1-android-mobile-client-v2-setup
But when giving the print bill from the mobile client, the print is not coming. In the mobile client settings I have selected the print bill option and still the print is not coming.
But when am connecting thorough RDP , the print is working fine. I have attached the backup file alsoMTBKP.zip (1.6 MB)
Am checking with the ‘waiter’ user.