Unity won't open the project anymore when upgrading the SDK to 5.1

[zach-dpt]

Preliminary Checks

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• This issue is not a question, feature request, or anything other than a bug report directly related to this project.

Description

I have a working project in Unity that was using the SDK 5.0.7 on my computer.
I upgraded the SDK to 5.1 and now the project won't open in Unity. It opens for 2-3 seconds and then just silently crashes. Nothing in the logs shows anything suspicious. It just closes.

Steps to Reproduce

1. Upgrade the SDK to 5.1
2. Open an existing Unity project

...

Expected Result

I expect the Unity project to open or to properly log why it is not working.

Actual Result

Unity silently crashes (no Unity crash report, nothing else) and the window just closes

ZED Camera model

ZED Mini

Environment

OS: Windows 11
Unity: 6000.2.8f1

Anything else?

To be able to open the project, I had to downgrade the SDK back to 5.0.7

[axelmax7227]

i had the same issue i had sdk 5.0.7 and when i open unity project after 3 sec the project just got closed. I upgrade in 5.1 and now the project opens normally.

[mmaitland007]

I had the same problem too. I had upgraded the windows SDK files and when I opened my old projects they'd crash after a few seconds. Just a silent crash without the opportunity to upgrade the Unity SKD. I had to force the program to go into safe mode by adding a broken .cs file so I could force some compiler errors, then I could upgrade via the package manager.