I (https://www.attilakrick.com/powershell/neuerungen-von-powershell-7/) have the same problem in the comments section when I release a pingback. While googling I found some pages, even from the year 2004, which have the same error. It is written in the comment area Pingback: itemprop=”name”>. If I look at it in html, it looks like the tag is not there and therefore opened wrong.
Disabled all plug-ins, without success.
Used the OceanWP theme.
Hope you find something.
Translated with http://www.DeepL.com/Translator (free version)
