Could not establish a connection with the Unity Package Manager local server process.

Hello everyone,

We’re sorry to see a recent influx of users are experiencing this error. We ensure you that we’re working hard on a solution for this recurring problem. In the meantime, we have compiled bits of advice from the community from threads like this into a sticky post which we will keep updated with what works and what doesn’t:
https://forum.unity.com/threads/tro…connection-with-unity-package-manager.869683/

If the above post does not help your issue, could you please respond to the following questions? Thanks!

  • Was Unity installed through Unity Hub?
  • Which version of Unity Hub are you using?
  • Which Unity version are you using? If multiple Editors are installed, please specify in which version the problem is present.
  • Was the same Unity version working one day and then stopped working the next day without you changing it?
  • Did you install a new program or run a Windows update and after that you are having problems with Unity?
  • Do you have an antivirus installed?
  • Do you have a firewall?
  • Are Windows Defender whitelist rules present?
  • Do you have a proxy configured?

Thanks to everyone in this thread for sharing your solutions!