Assertion failed: New world Crash on packaged project startup

Development Platform & Builds
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1

Hi. I just finished a game that i packaged for Windows 64 bit without any issues. The game also worked very well on standalone. However, on startup, the .exe crashes right away with a critical error that reads “Assertion failed: NewWorld”.

Here is my crash log. Can anyone help me with that issue?
crash log

for precision, i use UE 4.15.

2

Well well well. Seems like the engine didn’t like the fact that my main level was named Level0. So I just changed its name and now it works. Sorry for bothering people here.