Sass Compiling Error

/customers/5/3/d/elashair.com/httpd.www/wp-content/uploads/customers/5/3/d/elashair.com/httpd.www/wp-content/plugins/wp-scss/cache/
"File Permission Error, permission denied. Please make the cache directory writable."

https://elashair.com/wp-sitemap-posts-post-1.xmlhttps://elashair.com/wp-sitemap-posts-page-1.xmlhttps://elashair.com/wp-sitemap-taxonomies-category-1.xmlhttps://elashair.com/wp-sitemap-users-1.xml