Epic Games Launcher Crash With This Error Code

Development Getting Started & Setup
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I’m having the exact same issue. My issue started yesterday. I can not any longer get the launcher to open. In reference to your screenshot, I get this in error log:

Assertion failed: IsValid() [File:d:\build\++portal+release-live+compile\sync\engine\source\runtime\core\public\Templates/SharedPointer.h] [Line: 851]

EpicGamesLauncher
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kernel32
ntdll