chatGPT canvas issue: couldn't render code block

I want to report an issue of chatGPT canvas, it couldn’t render any code block on canvas any more in the last 15 hours. (it was ok when canvas released)

errror: f2w9a2b63ansnf40.js:21 Couldn’t find any way to convert unist node of type “code” to a ProseMirror node.

tried all browsers on my mac(2023 m2 pro 32G mbp, MacOS 15.0.1 (24A348)), (arc, chrome, firefox, safari), all were failed

Same problem with English text. No code blocks appear. I was able to copy and view the code when pasted externally. But dark screen otherwise. I didn’t see any toggle option for </> which the docs say exist.