Backup not working keeps saying cannot be enabled

Hi Nancyfdwebb58,

Thank you for using the Apple Support Communities! If you're unable to backup to iCloud, the guidance below can help:

If you can't back up to iCloud

If an alert says that there's not enough iCloud storage

1. In iOS or iPadOS, go to Settings > [your name].

2. Tap iCloud. At the top, you can check how much iCloud storage you've used.

3. Tap Manage Account Storage or Manage Storage.

4. Tap Backups, then tap the device you're using. Under Last Backup and Backup Size, you can check Next Backup Size. It may take a few minutes for your device to calculate Next Backup Size. 

5. If your backup needs more space than the amount you have available in iCloud, you can: 

•Delete information that you don't need to reduce the size of your backup

•Upgrade your iCloud+ plan to get more space

6. If you still need help, contact Apple Support.

Hope this helps!

Have a great day.