Samba share configuration will not save

Brand new installation of HA and Samba.
When I click save under the Samba share configuration tab, the changes revert back to the defaults.

any ideas?
remove and reinstall?

Can you please post your sanitised and correctly formatted config here?

it’s the default, it will not save changes

workgroup: WORKGROUP
username: homeassistant
password: null
interface: ''
  - 'fe80::/10'
  - ._*
  - .DS_Store
  - Thumbs.db
  - icon?
  - .Trashes
compatibility_mode: false

Try entering a password