[Open] Ads not playing and giving rewards

Product: The Sims Mobile
Platform:Android Phone
List the specific devices you play with (e.g. iPhone 6s Plus, Samsung Galaxy S7) Vivo Y91
OS Version Vivo rev 1.19.1
How often does the bug occur? Rarely (0% - 9%)
Steps: How can we find the bug ourselves? How to fix the problem? My ads cant play when i clicked it. And of course no rewards
What do you expect to see? Ads
Connection Type Wifi
Please select your region Other
Country philippines
Additional feedback

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1. Sorry i don't know what is bug but my ads just don't play and i have no rewards it's sad cause it helps me a lot ...