Any ideas how to solve this other than uninstall / reinstall?

[Christian Doetsch]

I updated Sourcetree yesterday, and now that it's updated, I am unable to open the application in Windows 11.

When I click the icon on my Desktop (or either .exe in the C:\Users\{me}\AppData\Local\SourceTree or specific version number directory \app-3.4.12), the app attempts to starts, I get the Icon splash screen for a second in the middle of my screen, but the app doesn't open. 

I'm going to try uninstalling + reinstalling since that seems to fix most of the problems I have. I guess the moral of the story is to never update.

The error below is from C:\Users\{me}\AppData\Local\Atlassian\SourceTree\sourcetree.txt

ERROR [2023-06-14 11:15:35,808] [1] [Sourcetree.Composition.VSMef.Net48.VSMefCompositionManager] [Log] - Unable to load MEF components
System.InvalidOperationException: Sequence contains no elements
at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
at Microsoft.VisualStudio.Composition.PartDiscovery.GetElementTypeFromMany(Type type)
at Microsoft.VisualStudio.Composition.RuntimeComposition.RuntimeImport.get_ImportingSiteTypeWithoutCollection()
at Microsoft.VisualStudio.Composition.RuntimeComposition.RuntimeImport.get_IsLazy()
at Microsoft.VisualStudio.Composition.RuntimeComposition.RuntimeImport.get_LazyFactory()
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.GetValueForImportSite(RuntimePartLifecycleTracker importingPartTracker, RuntimeImport import)
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.RuntimePartLifecycleTracker.SatisfyImports()
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.SatisfyImmediateImports()
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.MoveNext(PartLifecycleState nextState)
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.MoveToState(PartLifecycleState requiredState)
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.GetValueReadyToExpose()
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.<>c__DisplayClass15_0.<GetExportedValueHelper>b__0()
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.GetValueForImportElement(RuntimePartLifecycleTracker importingPartTracker, RuntimeImport import, RuntimeExport export, Func`3 lazyFactory)
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.GetValueForImportSite(RuntimePartLifecycleTracker importingPartTracker, RuntimeImport import)
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.RuntimePartLifecycleTracker.<CreateValue>b__10_0(RuntimeImport import)
at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.RuntimePartLifecycleTracker.CreateValue()
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.Create()
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.MoveNext(PartLifecycleState nextState)
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.MoveToState(PartLifecycleState requiredState)
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.GetValueReadyToExpose()
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.<>c__DisplayClass15_0.<GetExportedValueHelper>b__0()
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.GetValueForImportElement(RuntimePartLifecycleTracker importingPartTracker, RuntimeImport import, RuntimeExport export, Func`3 lazyFactory)
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.GetValueForImportSite(RuntimePartLifecycleTracker importingPartTracker, RuntimeImport import)
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.RuntimePartLifecycleTracker.<CreateValue>b__10_0(RuntimeImport import)
at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
at Microsoft.VisualStudio.Composition.RuntimeExportProviderFactory.RuntimeExportProvider.RuntimePartLifecycleTracker.CreateValue()
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.Create()
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.MoveNext(PartLifecycleState nextState)
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.MoveToState(PartLifecycleState requiredState)
at Microsoft.VisualStudio.Composition.ExportProvider.PartLifecycleTracker.GetValueReadyToExpose()
at System.Lazy`1.CreateValue()
at System.Lazy`1.LazyInitValue()
at Microsoft.VisualStudio.Composition.NetFxAdapters.MefV1ExportProvider.<>c__DisplayClass12_0.<UnwrapExport>b__1()
at System.ComponentModel.Composition.Primitives.Export.get_Value()
at System.ComponentModel.Composition.ReflectionModel.ImportingItem.Cast(Type type, Export export)
at System.ComponentModel.Composition.ReflectionModel.ReflectionComposablePart.SetImport(ImportingItem item, Export[] exports)
at System.ComponentModel.Composition.Hosting.ImportEngine.PartManager.TrySetImport(ImportDefinition import, Export[] exports)
at System.ComponentModel.Composition.Hosting.ImportEngine.TrySatisfyImportSubset(PartManager partManager, IEnumerable`1 imports, AtomicComposition atomicComposition)
at System.ComponentModel.Composition.Hosting.ImportEngine.TrySatisfyImportsStateMachine(PartManager partManager, ComposablePart part)
at System.ComponentModel.Composition.Hosting.ImportEngine.TrySatisfyImports(PartManager partManager, ComposablePart part, Boolean shouldTrackImports)
at System.ComponentModel.Composition.Hosting.ImportEngine.SatisfyImportsOnce(ComposablePart part)
at System.ComponentModel.Composition.Hosting.CompositionContainer.SatisfyImportsOnce(ComposablePart part)
at System.ComponentModel.Composition.AttributedModelServices.SatisfyImportsOnce(ICompositionService compositionService, Object attributedPart)
at Sourcetree.Composition.VSMef.Net48.VSMefCompositionManager.<Compose>d__5.MoveNext()

[Jachin Collins · Accepted solution]

Looks like the following post has a potential solution:

https://community.atlassian.com/t5/Sourcetree-questions/SourceTree-won-t-start-Unable-to-load-MEF-components/qaq-p/2388773 

[Christian Doetsch]

Excellent, thank you!

[Larry Harmon]

I have a similar problem.  Windows 11 update left Sourcetree not working.

I see that I now have source tree data in  C:\Users\harmo\AppData\Local\Atlassian\SourceTree

and C:\Users\harmo\AppData\Local\SourceTree.  I need a fix!

Sorry, not an answer