How to fix "The map specified on the commandline "/Game/Map/Frontend" could not be found. Exiting

Development Programming & Scripting
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need help

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I guess you have removed the startup map outside of the editor?

rename your config folder, then load your project up and specify in the project settings a new map it should load on startup. then in the new generated config copy the line to your map and put it in the original config folder and rename it back.