Hi, I am integrating the interstitial ads. I tried VPN in US and JP, however it's always showing that "Ad failed to load. Code: NO_FILL, Message: Server Message: no results. Try again in 10 seconds".
And I tried the solutions in the forum, which other developers encounter also, but it doesn't work either.
if you need some more informations to fix it, please let me know. Thank you.