Hi Arun,
Thanks for using Zoom SDK. Currently, we do not have 64-bit support for the Android SDK. Please see the announcement ([Valid before 08/01/2019] Zoom Android SDK 64-bit support). If you are seeing this error with the non 64-bit environment, please double check whether you have imported our libraries correctly by following the doc: https://marketplace.zoom.us/docs/sdk/native-sdks/android/getting-started/integration
Let me know if you have any other questions. Thanks!