I recently downloaded both mastercontroller and mastercontroller integration to use some sliders, Everything seems to work fine except CAS. When I try to go into CAS with testingcheats, or just try to dress up my sim by using the dresser, its impossible to click any clothes - only one clothing piece shows and it's unclickable, it also flickers in the clothes window and lags my game. I for sure know that it's only integrations fault, as i uninstalled it and everything works. Is there any solution for this?

The two most common culprits worth asking about before digging a little deeper are

1 - Have you allowed the game clock to move forward smoothly so the script mods can fully load before going into CAS?
2 - Do you by any chance have Lazy Duchess' latest version of the Smoothness Patch in play, with or without the helper files for MC? It is known to cause all kinds of compatibility issues still, at least as far as we can tell.

And if those are no help, here are two more things worth asking

3 - What happens if you try again on a test session, except with only NRaas mods (including MC Integration) in play? Something else not yet identified might be interfering with the MC version of CAS. You can of course quit without saving once you get an answer.

4 - What kind of install is this -- Origin/EA App, Steam, retail discs (and if so, what is your game's patch level), something else?