无法使用Package Manager安装或更新

[gumcstronger]

Unity6通过Package Manager进行Install package from git URL时会报错提示2021.3.30f1不是合法的Unity版本：
[Package Manager Window] Error adding package: https://github.com/Alex-Rachel/TEngine.git?path=UnityProject/Assets/TEngine.
Unable to add package [https://github.com/Alex-Rachel/TEngine.git?path=UnityProject/Assets/TEngine]:
Manifest [C:\Users\xxx\Desktop\xxx\Library\PackageCache\com.alex.tengine@2daa5482c365\package.json] is invalid:
'2021.3.30f1' is not a valid unity property value. Expected '.'.
UnityEditor.EditorApplication:Internal_CallUpdateFunctions ()