are you sure that you uploaded all the correct files into the correct folders from all your mods? If so , just do it like I described before (do not uninstall anything ). And when done, clear the cache.

Or another thing you can try is : Go to : admin tab / components / manage components and then you will see all your components that you have installed. And you will see next each one a red cross or a green mark. Just toggle them back and forth for all of them. That could work too.
And if not, I am out of clues and I suggest you contact ipb for more help.