Hello,
Do you run any other tools with rF2? I wonder if some other tool/app/plugin is interfering with CC.
Anyway, the first step in diagnosing this is to not use CC, just copy the plugin manually, start rf2, exit rf2. Do you see"Steam\SteamApps\common\rFactor 2\UserData\player\CustomPluginVariables.JSON" file? What are the contents?