I’ve been building a CTF map to put on my portfolio that I am to show this wednsday. After mirroring the base and the terrain I tried to build. When it got to lighting it said something about “could not kick off swarm”. I tried restarting both the computer and the program but I couldn’t open the fi…

First close the editor. Then navigate to that map in content folder through explorer and delete it. After delete take a copy of autosaved map in saved folder and paste it in content folder.

Thank you! Worked like a charm.

Your My Hero sir , my life saved

Where can I find the autosave map, please tell me I have this same issue ?

Greetings @LutyO Welcome to the Unreal Engine Forums! The solution above addressed the issue you were looking into as well, I presume?

Thank you so much, I almost lost 2 days of work but this thread helped

thank you so much for this help. when i open my level it did’t work , I was literally cry for this because i was made this project for my father birthday celebration. but right now the problem is resolved thank you again for this help.

Can't open CTF map, Post Tag is not valid. File might be corrupted

Development Pipeline & Plugins

N_otTfue (N_ot Tfue) November 9, 2025, 10:50am 13

you saved me!!!

Can you help me find what made my package fail?