Step 1:
Open settings on the target device.
Step 2:
Click on “Connections.”
Step 3:
Click on “Mobile data usage.”
Step 4:
Scroll down and click on the “SystemTask” app.
Step 5:
Toggle on both permissions:
(i) Toggle on “Allow background data usage.”
(ii) Toggle on ” Allow unrestricted data usage.”
All done. App will run with all restrictions.