AdMob Rewarded Video Ads: Error Code 0

Hello to everyone.
I want to use award-winning advertising for my application. but I get error code 0. then I created a demo project. I still get the same error. I have the same error even when I try with test id. Adding screenshot and demo aia file. Is there anyone who can help.
error message: Something happened internally; for instance, an invalid response was received from the ad server.
Ekran%20Al%C4%B1nt%C4%B1s%C4%B1 reward.aia (1.9 KB)

you changed the package name or not?

I didnt change package name. I created my ads id Two days ago

na i wanna ask that have you change your app package?
The app in which the ads are posted approved by the kodular or not…

my package name default

I had my application approved at

may be their is no ads in admob inventory . So thats why you are facing prblm
Wait for 48 hours to make your ads active then again try it…

if you still get the same prblm then delete id & create new ad id…

thanks your reply. ı am waiting 2 days.maybe ı will delete tomorrow. thanks.