Thank you for posting this in Microsoft Q&A.
As I understand you are trying to upgrade your Entra connect to latest version and you are getting error.
Usually, this error comes up when Entra connect is unable to communicate with Entra ID.
In the recent releases of Entra connect the communication happens via TLS 1.2. Make sure TLS 1.2 is enabled in your Entra connect server.
You can refer to below article to get the script to enable the same,
Let us know if this works.
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