Error opening DuoApp in Android Studio

[guanming001]

Hi

I got the following error when I tried to open the Duo-master\apps\android\DuoApp in Android Studio Version 3.1.2:

Error:Unsupported method: BaseConfig.getApplicationIdSuffix().
The version of Gradle you connect to does not support that method.
To resolve the problem you can change/upgrade the target version of Gradle you connect to.
Alternatively, you can ignore this exception and read other information from the model.

I am fairly new to Android Studio so not too sure on the meaning of the error. Any help is greatly appreciated.