mdbook no longer builds

[thor314]

I see the latest commit pokes the book; it may have broken mdbook build. On a fresh repo install, on mdbook build, the book fails to build:

2023-06-20 20:47:28 [INFO] (mdbook::book): Book building has started
2023-06-20 20:47:28 [INFO] (mdbook::book): Running the html backend
Error: The katex preprocessor does not support the 'katex' renderer
2023-06-20 20:47:28 [INFO] (mdbook::book): Running the katex backend
2023-06-20 20:47:28 [INFO] (mdbook::renderer): Invoking the "katex" renderer
Error: Unable to parse the input

Caused by:
    invalid type: map, expected a tuple of size 2 at line 1 column 1
2023-06-20 20:47:28 [WARN] (mdbook::renderer): Error writing the RenderContext to the backend, Broken pipe (os error 32)
2023-06-20 20:47:28 [ERROR] (mdbook::renderer): Renderer exited with non-zero return code.
2023-06-20 20:47:28 [ERROR] (mdbook::utils): Error: Rendering failed
2023-06-20 20:47:28 [ERROR] (mdbook::utils): 	Caused By: The "katex" renderer failed

[krnak]

same issue

[FilipLaurentiu]

I am also interested in a fix