Remove every CreateObject(...) under the OnGameModeIni() and put it on a notepad. After that, copy every CreateObject code and go to www.convertffs.com and convert everything to CreateDynamicObject(..).
My objects weren't spawning and it was given that error, I did that and I fixed everything. As far as i saw, you can only have 1 type of object spawn or it will not spawn the stuff... that's what I did, I've only got dynamic objects now under the gamemodeinit line and its working perfectly.