A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
Download the analytics Library from Package Manager first.
I also had same errors but i fixed them by removing Unity Ads by going to Windows>Package Manager>Ads.
I think you should use Unity Monetization 3.3.0 and remove Unity Ads by going to Windows>Package Manager>Ads and select remove. Then try to build.