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Unable to install Sourcetree 3.3.9 on Windows 10

I was using sourcetree application without any issue till last week.

Now when I click the app, the blue welcoming screen shows and nothing happens after that. I did follow these steps:

 - Checked task manager and nothing on Sourcetree app.

- Tried re-installation / uninstall and reinstall new version.

Now installing new version Sourcetree 3.3.9 is also behaving same. 

Control panel shows an entry with new app. But I am unable to install it properly.


Sharing log I found in following path above.

[11/11/20 01:55:47] info: Program: Starting Squirrel Updater: --install .
[11/11/20 01:55:47] info: Program: Starting install, writing to C:\Users\%user%\AppData\Local\SquirrelTemp
[11/11/20 01:55:47] info: Program: About to install to: C:\Users\%user%\AppData\Local\SourceTree
[11/11/20 01:55:47] info: CheckForUpdateImpl: Reading RELEASES file from C:\Users\%user%\AppData\Local\SquirrelTemp
[11/11/20 01:55:47] info: CheckForUpdateImpl: First run, starting from scratch
[11/11/20 01:55:47] info: ApplyReleasesImpl: Writing files to app directory: C:\Users\%user%\AppData\Local\SourceTree\app-3.3.9
[11/11/20 01:55:52] info: LogHost: Rigging execution stub for SourceTree_ExecutionStub.exe to C:\Users\%user%\AppData\Local\SourceTree\SourceTree.exe
[11/11/20 01:55:55] info: ApplyReleasesImpl: Squirrel Enabled Apps: [C:\Users\%user%\AppData\Local\SourceTree\app-3.3.9\SourceTree.exe]
[11/11/20 01:55:56] info: ApplyReleasesImpl: Starting fixPinnedExecutables
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: Defender Desktop Token.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: Excel.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: File Explorer.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: Internet Explorer.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: Microsoft Teams.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: Notepad++.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: OneNote 2016.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: Outlook.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Examining Pin: sqldeveloper.lnk
[11/11/20 01:55:56] info: ApplyReleasesImpl: Fixing up tray icons
[11/11/20 01:55:56] info: ApplyReleasesImpl: cleanDeadVersions: checking for version 3.3.9
[11/11/20 01:55:56] info: ApplyReleasesImpl: cleanDeadVersions: exclude new version folder app-3.3.9
[11/11/20 01:55:56] info: InstallHelperImpl: Couldn't write uninstall icon, don't care: System.Net.WebException: An exception occurred during a WebClient request. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at System.Net.WebRequest.get_PrefixList()
at System.Net.WebRequest.Create(Uri requestUri, Boolean useUriBase)
at System.Net.WebClient.GetWebRequest(Uri address)
at System.Net.WebClient.DownloadFileAsync(Uri address, String fileName, Object userToken)
--- End of inner exception stack trace ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Squirrel.UpdateManager.InstallHelperImpl.<CreateUninstallerRegistryEntry>d__5.MoveNext()
[11/11/20 01:55:56] info: Program: Finished Squirrel Updater


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