Failed to start the Unity Package Manager local server process.

Question

When I try opening or creating a project, through both Unity Hub and normal Unity, this error pops up:

Failed to start the Unity Package Manager local server process. Make sure the process [C:/Program Files/Unity/Editor/Data/Resources/PackageManager/Server/UnityPackageManager.exe] is not blocked by your anti-virus configuration.

I don't know what I should do, as there are only a few threads on the internet about this issue, and NONE has an actual answer. I reported this as a bug, but I got no response. How do I fix this error?

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Answer 1

Answer by kaikuehne · Feb 02 at 06:02 PM

TLDR: Reinstall unity and verify that the platform icons (see below) show up.

Hello, I experienced the same error. I thought that this was related to some form of network related issue, which was not the case. I had to reinstall the respective version of Unity and now it works, because apparently my installation was broken. Before reinstalling, the icons I highlighted below didn't show up. Now they do and it works. Not sure if this is related at all, I thought I'd share anyway.

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screenshot-2020-02-01-at-181632.png (355.4 kB)

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Answer 2

Answer by JayJennings · Feb 01 at 01:11 AM

Really, no answers?

I'm now running into the same problem on my Mac with Unity 2019.3.0f6 and can't find any solutions.

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Failed to start the Unity Package Manager local server process.

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