Banner Error: Banner placement null is not ready

I followed the Integration guide for Unity and have test interstitial ads working both in the editor and on a real build on my Android phone. I also have banner ads working in the editor, but I can’t get them to work on my phone. Using Android Logcat, I got the output attached below.


Unity Ads initialization completes, but when I attempt to show the banner ad, it says “Banner Error: Banner placement null is not ready”. Does that mean there aren’t enough banner ads in the pool currently, or did I do something wrong?
The code I’m using to load/show the banner ad was taken straight from Unity’s guide and I’m using Unity 2020.3.15f2.
Any help is appreciated, thanks.

Did you ever get this figured out? I’m getting the same error on 2020.3.22 now.