parsing with format:markdown fails

[chaals]

Description of problem

Taking the example HTML document at the start of the documentation, and adding

format: "markdown",

as the first line of the respecConfig definition I expected it to call the markdown parser and parse markdown added to the content.

Instead, the console produces the following error:

TypeError: Cannot read properties of undefined (reading 'search')
at Sr.parseInfoString (markdown.js:60:35)
at Sr.code (markdown.js:24:48)
at cn.parse (marked.esm.js:1843:42)
at parse (marked.esm.js:1803:23)
at Object.parse (marked.esm.js:2335:28)
at Function.dn [as parse] (marked.esm.js:2368:27)
at Rr (markdown.js:110:14)
at Er (markdown.js:135:23)
at Object.run (markdown.js:204:3)
at base-runner.js:71:24

And no markdown parsing happens (e.g. a couple of lines that would be separate paragraphs are just run together as a single paragraph according to HTML parsing)