Failed to load resource: the server responded with a status of 422

[walid_omonos]

What does this error mean ?

[Jason]

You've got an error in your scss file which is stopping the file from being rendered correctly.

Since the site is noted in the screen capture posted it was easy enough to find the file you're talking about. You've got this section of CSS in the file:

/* .filter-menu .mobile-header {
  
/*     display: none; */
  
} */

Whilst there might be other errors that looks like the first one to fix up.