I Googled, nothing relevant, so I came here.
Search Console has identified that your site is affected by 4 Merchant listings structured data issue(s). The following issues were found on your site.
### Top critical issues*
Invalid floating point number in property “price” (in “offers”)
\**Critical issues* prevent your page or feature from appearing in Search results.
### Top non-critical issues‡
Missing field “hasMerchantReturnPolicy” (in “offers”)
Missing field “shippingDetails” (in “offers”)
Invalid string length in field “name” (in “brand”)
WHen I dug deeper they appeared to be related to merchant listings that I don’t recall ever adding to my site.
Is it some form of spam or virus?