[游戏开发]unity工程打开时报错An error occurred while resolving packages: Project has invalid dependencies:

An error occurred while resolving packages:
  Project has invalid dependencies:
    com.unity.package-manager-ui: Package [com.unity.package-manager-ui@2.1.2] cannot be found
  Package com.unity.textmeshpro@2.0.0 has invalid dependencies:
    com.unity.ugui: Package [com.unity.ugui@1.0.0] cannot be found

Assembly has reference to non-existent assembly 'Unity.ugui' (Packages/com.unity.textmeshpro/Scripts/Editor/Unity.TextMeshPro.Editor.asmdef)

把工程目录下的Packages目录中的manifest.json删掉, 然后再自动生成

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