Thread:Project:Support desk/iSC Dev BP Wiki - problem: picture & thumb/reply (14)

The configuration seems fine, although apparently you should be using ForeignDBRepo instead of FSRepo, as explained in Manual:$wgForeignFileRepos. Maybe that's the problem, and FSRepo became incompatible on a recent version.

As for the debug log, you should set it up, load a page that throws the error, and disable the debug log again, since it will grow without limit until it fills up the space on your server.