You refresh your site. Everything is wrong. Text is Times New Roman. Columns are gone. Images are full width. Your beautiful Divi site looks like it is from 1999. Divi CSS is not loading. Do not panic. This is usually a cache issue.
Why Divi CSS Disappears
Divi generates CSS dynamically. It combines your module settings, theme options, and custom CSS into a single file. If that file is not generated or not loaded, your site loses all styling [citation:5].
Common causes:
- Aggressive CSS/JS optimization plugins
- CDN serving old files
- Server permission issues
- Outdated Divi version
Quick Fixes
Try these in order (one of them will work):
- Clear all cache – plugin cache, CDN cache, browser cache, server cache
- Regenerate Divi CSS – Divi → Theme Options → Builder → Advanced → Clear static CSS
- Disable CSS optimization temporarily – in Autoptimize, WP Rocket, or other plugins
- Save permalinks – Settings → Permalinks → Save Changes
If CSS Files Return 404
Open browser dev tools → Network tab. Look for CSS files with red 404 errors. This means the files are missing [citation:5].
Fix: Regenerate Divi CSS (see step 2 above). If that does not work, reinstall Divi (your content is safe).
Prevention
When using caching plugins, exclude Divi CSS from optimization. In most plugins, you can add:
/divi/css/, /et-core/, /builder/
to the exclusion list [citation:5].
Final Resort
Disable all optimization plugins. If the site looks normal, re-enable them one by one. The plugin that breaks the CSS is the culprit. Keep it disabled or configure exclusions.