SEO code produces invalid JSON-LD

[saper]

Using hugo-0.61.0

Google webmaster tools complain about the default JSON-LD entry on a home page:

{ 
  "@context": "http://schema.org", 
  "@type": "WebSite", 
  "url": "https:\/\/odpal.dajznak.pl\/", 
  "name": "Daj znak!",
   "author": {
      "@type": "Person",
      "name": ""
    },
  "description": "",
}

The errors is in the line with description - there is a trailing comma.

jq commands reports:

> jq -M .
parse error: Expected another key-value pair at line 11, column 1

On the page JSON-LD there are other issues as well:

{ 
    "@context": "http://schema.org", 
    "@type": "BlogPosting",
    "headline": "Polki nagrodzone!",
    "genre": "",  
    "url": "https:\/\/odpal.dajznak.pl\/posts\/polki-nagrodzone\/",
    "datePublished": "2019-11-22 21:00:00 \x2b0000 UTC",
    "description": "Piękny wieczór we frankfurckim Ratuszu - dziś Rada Obcokrajowców KAV przyznała nagrody wybitnym osobowościom obcego pochodzenia.\n",
    "author": {
        "@type": "Person",
        "name": ""
    }
 }

date has strange quote \x2b0000 and there is unescaped UTF-8 ("Piękny").

> jq -M .
parse error: Invalid escape at line 7, column 55

[saper]

JSON-LD quoting errors are probably hugo bugs, see gohugoio/hugo#6695