dunno, i downloaded this map and the patch a few days ago, and everything works in it, no errors showing up.
have you tried downloading it again from a mirror? as could have lost a bit of data in your download? or even unzip it again, as sometimes stuff gets mangled,
i have the basic stuff you need for most maps, simple streets, roadworks (baustellen) signs etc, but i recently had to to a fresh install of omsi due to the volvo bus download screwing things up, and moges map was the first i put on before i added others, and i got no errors showing.