The mod is very likely the problem. Make sure that sprites called in the mod have the right path and name. Linux Version is case sensitive so avoid capitals in both dm file and sprites unless you want to ban linux Users (that's us).
From my memory I recall rather that in the case of incorrect mods there was a "clear" Nagot Gick Fell window message, only temp dom16682 problems resulted in messageless crashing...
But surely KO is more knowledgeable than me on the subject !