In case of mess in your editor window, just add this line to your .vimrc:

let g:ale_virtualtext_cursor = 'disabled'

a mess in vim A mess in VIM (look at these red inline error messages)

The root cause of the issue

Some creative guys thought that mixing warning messages with code makes some sense and increases readability, and someone smart enough implemented it (to the misfortune of mankind).

A source of the mess in vim