Rest of errorÇ-
NuGet.PackageManagement.PackageReferenceRollbackException: Package restore failed. Rolling back package changes for 'Site'.
at NuGet.PackageManagement.NuGetPackageManager.ExecuteBuildIntegratedProjectActionsAsync(BuildIntegratedNuGetProject buildIntegratedProject, IEnumerable`1 nuGetProjectActions, INuGetProjectContext nuGetProjectContext, CancellationToken token)
at NuGet.PackageManagement.NuGetPackageManager.ExecuteNuGetProjectActionsAsync(NuGetProject nuGetProject, IEnumerable`1 nuGetProjectActions, INuGetProjectContext nuGetProjectContext, PackageDownloadContext downloadContext, CancellationToken token)
at NuGet.PackageManagement.NuGetPackageManager.InstallPackageAsync(NuGetProject nuGetProject, PackageIdentity packageIdentity, ResolutionContext resolutionContext, INuGetProjectContext nuGetProjectContext, PackageDownloadContext downloadContext, IEnumerable`1 primarySources, IEnumerable`1 secondarySources, CancellationToken token)
at NuGet.PackageManagement.NuGetPackageManager.InstallPackageAsync(NuGetProject nuGetProject, PackageIdentity packageIdentity, ResolutionContext resolutionContext, INuGetProjectContext nuGetProjectContext, IEnumerable`1 primarySources, IEnumerable`1 secondarySources, CancellationToken token)
at JetBrains.ProjectModel.NuGet.Operations.NuGetInstallOperation.<>c__DisplayClass7_0.<
b__0>d.MoveNext()
--- End of stack trace from previous location ---
at JetBrains.ProjectModel.NuGet.Operations.NuGetInstallOperation.InstallInternal(IProject project, String packageId, String packgeUserStr, NuGetFeedContext feedContext, Int32 nestedLevel, NuGetNotificationMode mode, NuGetOperationReporter reporter, Func`3 nativeInstall, NuGetProject givenNuGetProject)