unity安装以后打不开出现错误?

TheLudGamer

安装unity2019.3.4版本以后，打开时出现了这样的对话框，有好兄弟知道是怎么回事吗

Mecanim

Could not establish a connection with the Unity Package Manager local server process.unity 3D打不开已建项目或新建项目【unity】error: Could not establish a connection with the Unity Package Manager local server process解决问题后， 建议升级项目到最新长期支持 2019.4.2x 版本。
https://unity3d.com/get-unity/download/archive