If your child has a Huawei smartphone with Android version 8 or more, then for the Tigrow application to work properly, you need to make some settings.
Open the settings
Deactivate both buttons
Go back and hit settings
Open "Special access"
Open "Ignore battery optimization"
Click on the arrow and select all apps
Find "Tigrow" and click Allow
Open "Unrestricted data access"
Find "Tigrow" and turn on the button