Crash on opening file

Hi,
I am newbie in unreal engine. I just enable forward shading in project setting, were 3 checkmark, then ask me to restart the unreal engine. but from then , can not open the file and will crash.
I am using UE 5.5.1
Attached the error message.
please help me how can I fix that. It was almost done and ready for render.

Hello Ferrokh,

You should be able to revert that setting by going into \YourProjectDirectory\Config and opening DefaultEngine.ini.

You’ll then be able to manually change r.ForwardShading from ‘True’ to ‘False’

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Yes, It worked…
Thank you So much

Just one other question. before this crash happen, I do not have this flicking noise in my scene.
now I just edit the defaultengine.ini to False and then open the scene, everything is okay but got noise and flickering? do you have any idea ?

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I’ve got the same issue after turning it off. shadows are more pixelated and flickers, objects having a rougher edge. Exactly as in your picture.

Got exactly the same error code for my project today, odd coincidence…
but this solution helped me too, thank you!

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Glad to hear that you’re able to launch the project again.

For the ‘Dithered Shadows’ you’re seeing now - You could try deleting the entire DefaultEngine.ini file (make a backup of it first just in case)

Then when you launch the editor again, a new DefaultEngine.ini will be generated. (Hopefully with settings that make your shadows look normal)