Reactjs – TypeError: root.markClean is not a function in nextjs

My next js was working as expected till I tried to do npm run build and npm run export, then the error started to appear whenever I tried to do npm run dev

Failed to compile

Next.js (14.2.7)
./src/@menu/styles/styles.module.css
TypeError: root.markClean is not a function

and here is how my ./src/@menu/styles/styles.module.css looks :

.ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}