Hi @SkonPlayz ,
I hope you were able to solve it but if not, I did some research and found that the error you’re getting at line 1306 comes from an internal editor file called FortAssetManager.cpp. At that point, UEFN tries to load a critical asset required for the editor to function. When it can’t load it, the editor throws a fatal exception and shows the message:
“This is not recoverable and likely means you do not have the correct data to run Fortnite.”
This means the editor can’t continue because some fundamental base data is missing. It’s a serious internal error that can’t be fixed from within the editor or by changing project settings. It usually happens due to an incomplete or corrupted installation of Fortnite or UEFN, or because some files didn’t download properly after an update.
To fix it, I recommend opening the Epic Games Launcher, going to the Fortnite tab, clicking the three dots (…), and selecting “Manage”. From there, click “Verify” so the launcher can scan and repair any missing or corrupted files automatically.
If that doesn’t solve it, the best option would be to uninstall UEFN and reinstall it from scratch.
Hope it helps!