Comment 29 for bug 1273393

Something's odd there then, I'll have to investigate further with a clean VM rather than one I've been messing with.
The cause of the error though is that it's looking for the plugins in the Debian location rather than the Ubuntu location (Have you been fiddling with environment variables at all?)
 This in turn means it can't load the textures, and gives the missing files error :)

As a temporary copy the contents of /usr/lib/openbve/ to /usr/share/games/openbve

That should then work correctly I hope....