I managed to get this fixed, but rather than just ignoring it and moving on, I’m posting the solution here.
I opened up task manager and force-closed the unreal engine process.
Then I created a copy of the map I was editing, deleted the original (making sure it wasn’t in use anymore) and then renamed the copy to match the original name.
When I opened up the editor again, everything was fixed and I could save again.
I tried a few other things in the process, but this was what eventually fixed it.
Thanks for the feedback. I was in fact editing my own project, but thanks for the assist, you gave me some ideas on where the problem might be coming from.
I had two files with this problem, tried the solution described by TheWrathOfGod in one file, for testing purposes, and it worked… then I tried to save the other file without replacing it and it saved without problem, it was fixed too… I figure my problem was because I had another “ghost” Unreal Engine process opened in the background, that I was only able to see in the task manager, thanks
This can be fixed if you simply open your task manager, see if another instance of Unreal editor is in the background working and ending the task. however must be careful to not end the current Unreal editor or you’d remove everything you’ve done since your last successful save. To my case however, this error just eccured. You have to literally simply read the error message. click on the message, Ctrl+C to copy and paste in a notepad and read through. My fix was that the messaged was saying: inside the level blueprint of the current level, some assets are being referenced, however those exist in another “LEVEL”. those assets in the other level are apparently linked to the level blueprint of the current level. This happened to me simply because I copied everything from the level blueprint of an old “Level” and pasted to the level blueprint of my current level. if you notice, by pasting it says: some assets can’t be pasted accordingly or something like that. so simply select the assets in your current level and get reference in the level blueprint, pretty much replacing. and keep saving to get new messages to fix, such thing as saving is critical and if leaving it unsuccessful, you might lose a lot of progress!