Hello there @MustafaOzc26!
From your provided log, there are multiple failed calls for plugins, or ties to added content not found. Is your issue affecting a particular project? Or opening a new, blank project, results in the same problem?
If a blank project works as intended, then the solution is to remove all added content from your affected project. On the contrary, if even a new project crashes, then I would suggest a full uninstall/reinstall of all Epic software:
- First, uninstall the engine, launcher, asset packs, etc
- Next, open the registry directory HKEY_CURRENT_USER\Software\Epic Games\Unreal Engine\Builds, and delete any build entries
- Finally, delete the folders %userprofile%\AppData\Local\UnrealEngine and %userprofile%\AppData\Local\UnrealHeaderTool
- After that, no elements related to UE should be left in your system
- Now, reinstall UE launcher from scratch, and add any version of the engine you need