[Bug]: Uncaught `TypeError`: `window.__setPreferredTheme` is not a function

[Rudxain]

Summary

The dark/light button doesn't work

Page

https://react.dev/reference/react

Details

Console:

Uncaught TypeError: window.__setPreferredTheme is not a function
    NextJS 7
14-7422871710f1e520.js:1:209365
Uncaught TypeError: window.__setUwu is not a function
    NextJS 7
14-7422871710f1e520.js:1:58957

Yes, the "uwu?" button also doesn't work.

The hamburger menu and search button do work as expected