404 error when using relative paths

When trying to upload a css file that is in a higher path than the html file in which I am using it0( <link rel="stylesheet" href="../css/styles.css" type="text/css">) the console returns an error like this (GET /css/styles.css 404 1.537 ms - 158
), however everything is correct. I would like if you could help me fix this problem. I am using Webstorm in its latest version.