无法加载资源：服务器响应状态为404（未找到）url错误

inside the css-main folder here are the css files and the js folder contains js files image

while loading and running in localhost the css files gets accessed easily but while running in server it says (Failed to load resource: the server responded with a status of 404 (Not Found)) while files are in the same position format as they were in localhost.

i have already tried changing position and url as well.

<link rel='stylesheet' id='smls-scroller-style-css'  href='css-main/jquery.mCustomScrollbarf488.css?ver=1.1.0' type='text/css' media='all' />

Failed to load resource: the server responded with a status of 404 (Not Found)

this is the current server positioning of css files and the php file. image