Big Bomber Formation Invalid Actions

[dresoccer4]

I was trying to make a simple WW2 big bomber formation but keep getting errors when trying to save, which don't make sense to me. Anyone able to see what the issue is here?

UPDATE: figured it out, the game did not like me having "Nothing" mission type for the bombers. i changed it to ground attack and it worked

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Edited May 21, 2024 by dresoccer4