So looking closer, that error is when there's no info.txt file in a mod. Tends to appear when you mouse over the mod name in the list. Mine however has an info.txt file though, so either you have some other mod that's generating that error, or you didn't extract the mod out entirely correctly. If it's some other mod, then you can just ignore the errors, they don't affact applying. If it's mine, then you've extracted it wrong somehow.
My mod is several files and has to be extracted as a subdirectory of the mods folder. It's more than that one file.