Firebase app test result error only in API Level 21

Test Report -

Fatal exception

java.lang.VerifyError: Rejecting class io.kodular.yashagarwaljaipur.Tambola_Tickets_Real_Voice.Screen1 because it failed compile-time verification (declaration of ‘io.kodular.yashagarwaljaipur.Tambola_Tickets_Real_Voice.Screen1’ appears in /data/app/com.yashagarwaljaipur.ttrv-1/base.apk)

 FATAL EXCEPTION: main

Process: com.yashagarwaljaipur.ttrv, PID: 20999
java.lang.VerifyError: Rejecting class io.kodular.yashagarwaljaipur.Tambola_Tickets_Real_Voice.Screen1 because it failed compile-time verification (declaration of ‘io.kodular.yashagarwaljaipur.Tambola_Tickets_Real_Voice.Screen1’ appears in /data/app/com.yashagarwaljaipur.ttrv-1/base.apk)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.Class.newInstance(Class.java:1572)
at android.app.Instrumentation.newActivity(Instrumentation.java:1068)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2466)
at android.app.ActivityThread.access$1200(ActivityThread.java:152)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1341)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5538)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

Please help me to understand this test report by firebase Test run.

Please help me with the error