Ok, I had this problem too. Last night my project was perfectly fine. this morning, I turn on the computer, load up editor, and discover that the level file I’m working on is missing in editor browser, but not missing in it’s folder on my computer. So I located the backup .umap save and replaced the level .umap as drummerof13 described. Immediately I am able to load up the missing level file I thought I’d lost. OK now I have a new problem- when I go to play the level to test it out, I discover that A- I am not being spawned at my player start. B- My third person pawn (Player) is not being spawned at all C- (Probably related to B) I cannot move or control the pawn.
I’ve tried pretty much everything I can think to do- Restart editor, delete and replace player start, delete and replace thirdpersonBP, etc etc. I am completely lost. any ideas? This issue seems to be too specific to yield any help from google searches…