unnamed item about structured-data-json-ld HOT 1 CLOSED

I see the services schema but I don't see "unnamed item" error in the SDTT. (Or a logo)

I tried adding a logo and the following SD worked:

<script type="application/ld+json">
{
  "@context": "http://schema.org/",
  "@type": "Service",
  "serviceType": "law paper writing service",
  "url": "https://www.lawwriting.co.uk/",
  "provider": {
    "@type": "Organization",
    "name": "lawwriting"
  },
  "areaServed": {
  "@type": "State", 
  "name": "united kingdom",
  "logo": "https://placehold.it/32.jpg"
  } }
</script>

As for the Rich Results test, "Services" isn't supported.

From the docs:

Supported rich result types
This test currently supports only the following rich result types:

• Event
• Fact check
• Film (media type)
• Job posting
• Logo
• Product
• Q&A page
• Recipe
• Sitelinks searchbox

from structured-data-json-ld.