Localbusiness doesn't contain 'image'

Site URL: https://www.robertwagstaff.co.uk

Hi there,

I've been running my webpages through the Google Rich Results Test, and any webpage I try, I get an error. It seems the webpages have two schema types by default, Organization and LocalBusiness. In the localbusiness, it leaves 'image' blank, which is required by Google, hence the error.

So how do I fill this in? I've tried adding images to the page, to the banner, and rooting through the site settings but no luck so far.