SourceTree won't start

[Miller Lopez]

Running Windows 10 Pro, and after a reboot of my machine sourcetree stopped working. The splash screen would flash on screen and then disappear without opening the application. I have tried:

- deleting Assemblies.cache and Composition.cache from C:\Users\{user}\AppData\Local\Atlassian\SourceTree.exe_Url_gabrloo4xyt1uisb2u0llx4mj5wjyjp3\3.4.8.0

- deleting the C:\Users\{user}\AppData\Local\Atlassian\SourceTree.exe_Url_gabrloo4xyt1uisb2u0llx4mj5wjyjp3 folder

- uninstall/reinstall the application

- delete all sourcetree and atlassian related files and folders

- reinstall various version (2.1.5, 2.3.5, 3.4.8, and latest version)

- rebooted serveral times

- trying installing in safemode

No log file gets generated. 

[Miller Lopez]

I was able to resolve the issue. When trying to install version 2.4.8.0, event viewer would throw an error. The line that caught my attention was:

Exception information:
Exception type: ConfigurationErrorsException
Exception message: Unrecognized configuration section oracle.manageddataaccess.client. (C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config\machine.config line 284)

Looking at the machine.config file I saw that TNS_ADMIN was pointing to a client install (C:\Oracle\product\12.2.0\client_1\network\admin) that no longer existed that I had uninstalled weeks prior, and replaced with 19c. I reinstalled the 12c client along with the 12c ODAC installer because the configuration was required for the Oracle Data Provider installation.

After reinstalling 12c the SourceTree installation worked.