Here are a few things you can try if you can't add or remove a profile. Check after each one to see if the problem’s still there.
Restart your device
Switch off your device completely. Once it’s shut down safely, switch it on again.
Restarting your device is often the simplest way to fix issues like this.
Update your device
Make sure your device is running on the latest version of operating system. To find out more about how to update your device check out your device manufacturer’s website.