Name: eslint (for javascriptreact filetype)
URL: https://eslint.org/

This issue may be bug report.
After the Vim version 8.1.1930, .jsx file is recognized as 'javascriptreact' filetype.
vim/vim#4830

I use Vim 8.1.1999 version, so I need to add below lines to my .vimrc to use ALE:

" filetype javascriptreact -> javascript.jsx
au BufRead,BufNewFile *.jsx set filetype=javascript.jsx

Sorry for my cheep English skills.
ALE is great plugin. Thank you.