Intermediate
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Stores temporary files used by UEFN during build and run.
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Safe to delete – UEFN will recreate it automatically.
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Delete it if you have build errors or slow performance.
Saved
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Stores temporary settings and log files for your project.
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Safe to delete – but you might lose some minor settings.
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Delete it if UEFN is not working properly or shows errors.
C:\Users\AppData\Local\UnrealEditorFortnite
Before deleting the files, close the UEFN engine, then delete the two folders.
Don’t worry, it’s a safe and proven method.
After that, try again and let me know if the problem is solved.