[Package Manager Window] Cannot perform upm operation: self signed certificate in certificate chain

Unity Engine
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  1. Not able to sign in to unity hub 3.5, when I click on sign in its opening a blank page and after few minutes redirects to the unity hub , but nothing happens.

  2. Always getting [Package Manager Window] Cannot perform upm operation: self signed certificate in certificate chain [NotFound]. error in console when I try to open package manager. Also the same error restricts me from installing a package as shown below.

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Gone through some related forums [Package Manager Window] Cannot perform upm operation: self signed certificate in certificate chain , but nothing helped me. This is what I get when I run UPM diagnostics

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Hi @Ram_N ,

This error message means that the server to which the Unity Package Manager is talking to is not the one that it thinks. It sounds like you are on a network that uses a proxy server which intercepts HTTPS requests, which then acts like a in a classic MitM (machine-in-the-middle) attack. If this connection interception is legitimate, then you need to configure Unity with the details of the SSL certificate that the proxy server is using.

I suggest you take a look at the following page, which contains information about configuring Unity and UPM to trust certificates issued by custom certificate authorities: Unity - Manual: Trusting the web proxy security certificate