In some situations it is common for Search Console / Structured data to acknowledge the lack of some markup missing updated e Missing fn in the structured data section.
This error can occur for a number of reasons, understand a bit more about structured data, and how to correctly validate and correct this error.
About structured data
You can help Google by providing explicit clues about what a page means by using structured data on a page.
Structured data is a standardized format for providing information about a page and classifying page content; for example, on a recipe page, what are the ingredients, the cooking time and temperature, the calories and so on.
Google used the structured data you find on the web to understand the content of each page, as well as to collect information about the web and the world at large.
This way it can display them in the search results using the "Rich Snippets" and improving the user experience.
Let's miss Missing updated and missing fn
But if you also did the test using the official tool: https://search.google.com/structured-data/testing-tool and in this test, the error quoted in Search Console is not also accused by the tool, take into account the last test.
The test tool analyzes the real-time version of your site performing all the necessary validations. The errors reported in the search console are a few days, so if you fixed them in the meantime, you can ignore these errors.
Both tools accuse the same error
If the error is displayed in both tools the correction should be done in the HTML / Code of your website by a programmer.
The error hcard missing fn in WordPress can occur due to a bad customization or even the theme in question that does not give due support to the structured data.