Not working on device

[usman581]

It says this on logcat but working in the editor i just have implemented in my previous game work fine but now implementing in other game it gave me this error.
please help

[usman581]

Since the plugin is working fine on unity 2019.1 but now i have updated the version of my unity and created a new project the unity version is 2019.2.9 but now when i play it says not initialized unityiab plugin please help anyone