Ads not showing after approval

In first time I open my app ads is showing after second time I open my app then ads is not showing. I search on community everyone has saying but still no solution is there. Why my admob ads is not showing. Is this a bug in kodular every one is say in community but still no solution. Why ? How I fix this issue

What error does it show?

If you don’t know the use the Admob Ad Failed To Load block to check what the error is.