2021.2.7: DownloadHandlerTexture and UnityWebRequestTexture not recognized?

Questions & Answers
1

After importing GooglePlayGamesPlugin into my project, I got these errors (see image and below). What am I missing? The PlayGamesAchievement.cs file is also attached.
Any help appreciated!
Unity version 2021.2.7f1
Errors:

  • CS0103: The name “UnityWebRequestTexture” does not exist in the current context
  • CS0103: The name “DownloadHandlerTexture” does not exist in the current context
    [190812-playgamesachievement.txt|190812]
UnityWebRequestTexture seems to be missing
2

In a new created project, there is no problem with those classes.
I compared the manifest and package-lock files in the Package folder. In my project WebRequestTexture was missing there.
When copying that parts to my project, the errors disappeared.