Couldn't locate or instantiate custom event: com.mopub.mobileads.MillennialBanner


Updated mopub sdk to 4.3.0 from jCenter AAR as recommended and I’m getting the following error. What could be the problem?

Loading custom event adapter.
Attempting to invoke custom event: com.mopub.mobileads.MillennialBanner
Couldn’t locate or instantiate custom event: com.mopub.mobileads.MillennialBanner.
Loading failover
Loading url
Failed to retrieve GPS location: access appears to be disabled.
Ad failed to load.


Hi @SoccerArenaApp,

It sounds like you are missing the adapter for Millennial Media. The MoPub full SDK includes built-in support for Millennial Media. However, Millennial Media has deprecated support for Ant/Eclipse, so migrating users should use the MoPub Android base SDK and follow Millennial’s Ant/Eclipse Integration Guide.

If you are still having trouble, please reach out to the Support Team at with the logs you provided, your account username, ad unit ID and any additional clarifying information so they can help you.