How to fix google admob ad installation error in unity?

Question

Unity

I'm trying to embed ads in the game. I do according to the instructions of admob.
1. Install the Unity plugin prerequisites plugin. (at first I thought that this was enough, I made an aab build - no errors, uploaded it to google play, installed it, the game does not start with an error)
2. Then I added a test key to the settings (Assets -> Google advertising settings), the key with the same site (repeat the download - nothing has changed)
3. Then, as I understand, you still need to install the second plugin: Download and import the early build of GMA Unity plugin. (installed it, as I understand it, it partially duplicates the first one, and therefore cannot get up normally, which is why the following is written in the console:

I reinstalled them, did Reimport Everything, did Android Resolver -> Resolv - nothing helps. what's the problem?

Answer 1

This is the first time I hear about the Unity plugin prerequisites plugin.
You just need to remove everything unnecessary and cleanly install the GoogleMobileAds plug-in for Unity , make a resolution and it will download the libraries, include Admob or Ad Manager ads for mediation in GoogleMobileAdsSettings and insert a test advertising code.