I'm using successfully MoPub displaying ads correclty. I created a new Ad Unit in the MoPub publisher console, I changed the current id with the new id but no ads are displayed anymore. In the logcat I see the following message:
Ad Unit (xxxxxxxxxxxxxxx) is still warming up. Please try again in a few minutes.
I waited for 8 hours but still get no ads. What's I'm doing wrong?
Today I started receiving ads. It seems that up to 2 days are needed to warm up ad-units. Also posted a request on the mopub forum without having got any response (https://groups.google.com/a/mopub.com/forum/#!category-topic/mopub-users/technical-integration/71iV6IFEFJ0)