Invalid backend response. Error occurred on the server side. HTTP error 500

[phanvantien2907]

Hi guys, I'm having a small problem in my laravel project. I integrated elfinder to manage files, images (I use pakapge barrydh) but on localhost it works but when I deploy to laravel cloud it shows an error Invalid backend response.
Error occurred on the server side.
HTTP error 500 then. Please give me a solution to fix it. Thanks