Resolved IDE integration not working if the project has errors

SOLVED: it was an old version of external dependency manager that caused the issue for me.


Hello everyone!

Today I opened up a project that I was working on yesterday, and the IDE integration with Rider completely broke - it refused to recognize Unity classes and namespaces, and I was getting an error "Advanced Unity integration is not available."

I have tried to reinstall Rider, Unity (deleting all installs as well as Unity Hub) as well as the Rider plugin for Unity, but it didn't solve the issue. I also installed Visual Studio Community 2022, but it had the same issue as well. There's also no Rider menu in the Preferences window, so I cannot set the log level for this.

I also tried creating a new project - for which both Rider and VS were recognized and working properly - but as soon as I copy in the assets from the actual project, it all breaks again.

I'm using Unity Editor 2021.3.19f1, Rider 2022.3.2, on Windows 10 Pro 22H2 19045.2728