It is important that the Ultimate Inventory System and the Character controller are updated to the latest version. Check the version of our assets in the bottom left of our editor windows. Do NOT trust the package manager version, the Unity Package Manager
doesn’t always import the most recent update after you download the asset. Ensure you are getting the latest by removing the package cache from the
Asset Store download folder.
You may check the required versions for both packages in the Integration window (inside the inventory system editor).
Do not forget that the Character Controller package must be installed after it has been imported. Learn more about the Character Controller installer
here