Game crash after loading screen

[nexim1 0]

Hi, has anyone had this error? if so, could you please advise me how to fix it? after adding the map the game crashes before the screen loads. I already checked the index and atlas info and I can't figure out how to fix it. since I'm a beginner, it's probably quite likely that I messed something up

syserr: 0510 08:01:09128 :: invalid idx 0

thank you in advance