Getting Error for interstitial ads

[Ram]

I am getting below error whenever I try to show interstitial ads on android(5.1.1).
java.lang.RuntimeException: Unable to start activity ComponentInfo{----- /com.google.android.gms.ads.AdActivity}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content

Note: It is working fine on higher version of android(10, 11)

Is anyone also facing the same issue?