---
title: Troubleshooting | Knowledge Base - Prerender.io
description: Fix common issues with rendering, caching, and crawler access.
---
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1. [Knowledge Base - Prerender.io](https://docs.prerender.io/docs)
2. [Troubleshooting](https://docs.prerender.io/docs/troubleshooting)
# Troubleshooting
Fix common issues with rendering, caching, and crawler access.
- [Why is Prerender.io returning empty or partially rendered pages?](https://docs.prerender.io/docs/25-empty-or-partially-rendered-pages)
- [Why are my Material UI styles missing when using Prerender.io with a React app?](https://docs.prerender.io/docs/how-to-fix-css-caching-issues-in-react-sites)
- [Why has Prerender.io stopped rendering or recaching my pages?](https://docs.prerender.io/docs/why-has-prerender-stopped-rendering-or-recaching-my-pages)
- [Prerender.io status codes explained](https://docs.prerender.io/docs/status-codes)
- [Why is my CDN serving unrendered content to bots?](https://docs.prerender.io/docs/cdn-issues)
- [Troubleshooting your Prerender.io integration and best practices](https://docs.prerender.io/docs/4-troubleshooting)
- [Why is Prerender.io caching my 404 pages as 200?](https://docs.prerender.io/docs/404-page-is-cached-as-200)
- [How do I export a 404 error report from Prerender.io?](https://docs.prerender.io/docs/export-a-report-of-all-404s-in-the-past-xx-days)
- [How do I find URLs that failed to cache?](https://docs.prerender.io/docs/how-do-i-find-urls-that-failed-to-cache)
- [Why is my sitemap marked as "Unhealthy" or failing to crawl?](https://docs.prerender.io/docs/why-sitemap-fails)
- [How Prerender.io works with CDNs](https://docs.prerender.io/docs/how-does-prerender-work-with-cdns-like-cloudflare-fastly-or-akamai)
- [What should I do if I get a "Prerender integration not detected" error in the Domain Manager?](https://docs.prerender.io/docs/what-should-i-do-if-i-receive-a-prerender-integration-not-detected-error)
- [Why am I seeing 403 or 404 errors after integrating Prerender?](https://docs.prerender.io/docs/why-am-i-seeing-403-or-404-errors-after-integrating-prerender)
- [Why is my Apache .htaccess integration with Prerender.io not detected?](https://docs.prerender.io/docs/troubleshooting-apache-.htaccess-integration)
- [Why are elements missing from my Prerender cached pages?](https://docs.prerender.io/docs/why-are-elements-missing-from-my-prerender-cached-pages)
- [What should I do if I am experiencing high volumes of unwanted renders?](https://docs.prerender.io/docs/what-should-i-do-if-im-experiencing-high-volumes-of-unwanted-renders)
- [How to Avoid 429 Error Codes with Prerender](https://docs.prerender.io/docs/429-status-code)
- [How do I find pages that have not been requested in the past 30 days?](https://docs.prerender.io/docs/pages-that-have-not-been-requested-in-the-past-30-days)
- [Rendering queues](https://docs.prerender.io/docs/10-recaching)
- [Edge CDN status codes and behavior](https://docs.prerender.io/docs/edge-cdn-status-codes-and-behaviour)
- [How do I find and fix soft 404s in Prerender?](https://docs.prerender.io/docs/404-checker)
- [Why am I seeing 504 or 403 errors in my Prerender.io render history?](https://docs.prerender.io/docs/how-can-i-whitelist-prerenders-ip-addresses-and-user-agents)
- [Is it possible for response times to increase after integrating with Prerender.io?](https://docs.prerender.io/docs/is-it-possible-for-response-times-to-increase-after-integrating-with-prerender)
- [How do I change the speed of my Prerender render queue?](https://docs.prerender.io/docs/how-do-i-change-the-speed-of-my-render-queue)
- [Why are some of my pages not getting cached?](https://docs.prerender.io/docs/some-pages-are-not-getting-cached)
- [How do I clear my Prerender.io cache?](https://docs.prerender.io/docs/how-to-purge-cache)
- [How do I reduce the number of renders?](https://docs.prerender.io/docs/how-to-reduce-the-number-of-pages)
- [Why are my pages not recaching on schedule?](https://docs.prerender.io/docs/pages-not-recaching-on-schedule)
- [Why does Prerender.io show "Integration not detected" after setting up Cloudflare?](https://docs.prerender.io/docs/cloudflare-integration-not-detected)
- [Why are my renders spiking from srsltid URLs?](https://docs.prerender.io/docs/why-are-my-renders-spiking-from-srsltid-urls)
- [How do I check the cached version of a URL?](https://docs.prerender.io/docs/how-to-check-cached-versions-of-your-urls)
- [How do I check Prerender.io service status and get maintenance updates?](https://docs.prerender.io/docs/keep-track-of-prerender-service-maintenance)
See less ▼
- [How Prerender.io works](https://docs.prerender.io/docs/how-prerender-io-works)
- [Getting started](https://docs.prerender.io/docs/getting-started)
- [Integrations](https://docs.prerender.io/docs/integrations#main-content)
- [Prerender.io officially maintained integration](https://docs.prerender.io/docs/integrations#prerender-io-officially-maintained-integration)
- [Bubble](https://docs.prerender.io/docs/integrations#bubble)
- [FAQ](https://docs.prerender.io/docs/integrations#faq)
- [Get Found on AI & Search](https://docs.prerender.io/docs/get-found-on-ai-search#main-content)
- [Google Search Performance](https://docs.prerender.io/docs/get-found-on-ai-search#google-search-performance)
- [Troubleshooting](https://docs.prerender.io/docs/troubleshooting)
- [Billing & Account](https://docs.prerender.io/docs/billing-account#main-content)
- [Plans & Subscriptions](https://docs.prerender.io/docs/billing-account#plans-subscriptions)
- [Renders, Usage & Limits](https://docs.prerender.io/docs/billing-account#renders-usage-limits)
- [Payments & Invoices](https://docs.prerender.io/docs/billing-account#payments-invoices)
- [Account Access & Security](https://docs.prerender.io/docs/billing-account#account-access-security)
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