Hi,
Thank you for contacting the Mobile Ads SDK Support team.
There is no way to access the older documentation of Google AdMob for Unity. You can refer to this.
Firstly, it is recommended that you use the latest version of the Google Mobile Ads Unity plugin which can be downloaded here.
Now try to build and run your project. Additionally, you can also refer to our sample apps and documentation for more guidance. If you continue to have an issue with this then provide us with a sample project of your implementation privately so we can take a look.
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Mobile Ads SDK Team |