--- title: "robots.txt blocks JS/CSS needed to render (seo/robots-blocks-resources)" description: "seo/robots-blocks-resources: Google renders pages with their scripts and styles; blocking /_next/ makes it see a broken page." canonical: https://void-design.vercel.app/rules/seo/robots-blocks-resources lastModified: 2026-09-16 --- # robots.txt blocks JS/CSS needed to render `seo/robots-blocks-resources` · severity **error** · category SEO · detected by `void seo` and `void audit` ## Why it matters Google renders pages with their scripts and styles; blocking /_next/ makes it see a broken page. ## How to fix it Never disallow /_next/ or other asset paths; disallow only private routes such as /api/ and /account/. ## References - https://developers.google.com/search/docs/crawling-indexing/javascript/javascript-seo-basics ## More seo rules `void seo` reports 60 rules in this category. What search engines need from the raw response: status codes, titles and descriptions in , self-referencing canonicals, one h1, crawlable links, Open Graph, icons, robots.txt and a sitemap with real dates. - `robots-txt-unreachable` robots.txt returns 5xx/429 or times out — [seo/robots-txt-unreachable](https://void-design.vercel.app/rules/seo/robots-txt-unreachable) - `robots-txt-missing` No robots.txt — [seo/robots-txt-missing](https://void-design.vercel.app/rules/seo/robots-txt-missing) - `robots-txt-invalid` robots.txt serves HTML, exceeds 500 KiB, or has unparseable lines — [seo/robots-txt-invalid](https://void-design.vercel.app/rules/seo/robots-txt-invalid) - `robots-blocks-all` robots.txt disallows the site for * / Googlebot / Bingbot — [seo/robots-blocks-all](https://void-design.vercel.app/rules/seo/robots-blocks-all) - `robots-sitemap-directive` robots.txt has no absolute Sitemap: line — [seo/robots-sitemap-directive](https://void-design.vercel.app/rules/seo/robots-sitemap-directive) - `sitemap-missing` No reachable sitemap — [seo/sitemap-missing](https://void-design.vercel.app/rules/seo/sitemap-missing) - `sitemap-invalid` Sitemap isn't valid sitemap XML or exceeds protocol limits — [seo/sitemap-invalid](https://void-design.vercel.app/rules/seo/sitemap-invalid) - `sitemap-url-invalid` Sitemap is relative or on another host — [seo/sitemap-url-invalid](https://void-design.vercel.app/rules/seo/sitemap-url-invalid) Detected by `void seo` and `void audit`. Explain it in a terminal: `void rules seo/robots-blocks-resources`