Creating an iCloud

There is a maximum amount of iCloud accounts you can open from one iPhone.

Either create the iCloud account from another device. You can still sign in on your iPhone

If you can't do that you can see what apple support can do for you:

Contact Apple for support and service - Apple Support

For more info see:

If you see a Could Not Create Apple ID or Could Not Set Up iCloud message - Apple Support

Good luck!

Information.

The maximum number of free accounts have been activated