404 error on VisuallyHidden.css.mjs.map

[shadow galleon]

Hello!

I am quite new to Mantine, so i went to the Mantine UI section and copied the header called Header with mega menu with its module.css file.

Question 1:
In the module.css file i get this error:
Unknown at rule @mixincss(unknownAtRules)

How can i fix that?

Question 2:
When the burger menu opens on smaller screens, i get this error:
GET /_next/static/chunks/app/VisuallyHidden.module.css.mjs.map 404 in 659ms

I have tried googling, but cant seem to find a solution

[viscid ether]

Follow getting started guide to get started with your framework – https://mantine.dev/getting-started/
If you do not know how to setup application locally, use one of the templates.