The Xamarin forms project didn't load with this message.

• Visual studio - 17.6.14 (build 413)

This happened to me after the workload was restored, possibly due to the .NET 8 update.

1. Check the dotnet version (dotnet --version)
2. If the .Net version is 8.0.401 or higher, remove it (use the dot net uninstall tool) - sudo ./dotnet-core-uninstall remove 8.0.401 --SDK (with elevated permission)
3. dotnet version fallback to 8.9.204 - project loads and running

Maybe the MAUI project stopped working - will update