Title: Additional CSS live-preview stopped working
Last modified: April 5, 2023

---

# Additional CSS live-preview stopped working

 *  Resolved [raccoondog](https://wordpress.org/support/users/raccoondog/)
 * (@raccoondog)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/additional-css-live-preview-stopped-working/)
 * Additional CSS live-preview stopped working yesterday – though that CSS still
   works on the site. The preview frame now displays what the site looks like without
   any Additional CSS. Code changes are not reflected in the preview frame, but 
   if saved they can seen via Visit Site. 
   I cloned the site and deleted all the
   Additional CSS from the clone, but the preview still doesn’t display the effect
   of valid rule sets when added.**Just before it stopped working, I’d enabled Advanced
   CSS controls. I suspect that the problem lies with that change – but now I can’t
   find a way to disable it.Also, this is the root website site of a multisite. 
   The secondary sites still have functional CSS live-previews. FWIW, they also 
   don’t seem to offer an option to enable Advanced CSS controls, but naturally 
   I’m fine with that.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fadditional-css-live-preview-stopped-working%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Moderator [bcworkz](https://wordpress.org/support/users/bcworkz/)
 * (@bcworkz)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/additional-css-live-preview-stopped-working/#post-16633392)
 * Check your browser console for JavaScript errors. Unresolved errors will cause
   current Additional CSS to not display correctly.
 * What is Advanced CSS Controls? A plugin? If you have trouble with it, you should
   seek help through its dedicated support channel.
 *  Thread Starter [raccoondog](https://wordpress.org/support/users/raccoondog/)
 * (@raccoondog)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/additional-css-live-preview-stopped-working/#post-16634258)
 * Thank you, bcworkz.
   “Advanced CSS controls” is not a plugin, but a part of the
   WordPress “CSS Editor” that is not necessarily exposed to the user. [https://wordpress.com/support/editing-css/#advanced-css-controls](https://wordpress.com/support/editing-css/#advanced-css-controls)
 * The problem appeared after I enabled it, but I can’t find a means to disable 
   it. Further evidence that “Advanced” is causing the problem is that checking 
   the “Start Fresh” box briefly restores the live-preview
   FWIW, the browser console
   does show a difference between the root site (left) and the still fully functional
   CSS Editor on the sub-sites (right). But the details might not matter if I can
   find a way to disable the “Advanced CSS controls”.
 * ![](https://i0.wp.com/cc.cnps.org/wp-content/uploads/2023/04/both-error_Capture-
   1.jpg?ssl=1)
 *  Moderator [bcworkz](https://wordpress.org/support/users/bcworkz/)
 * (@bcworkz)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/additional-css-live-preview-stopped-working/#post-16635315)
 * As you no doubt surmised, I’m unfamiliar with such a thing. The reference you
   linked is for WP **.com**, which does not necessarily translate to WP **.org**.
   If it’s a .com only feature, you may have access to it through JetPack. Try deactivating
   JetPack as a test to see if it goes away. If it does, ask how you should properly
   disable it through JetPack support.
 * BTW, the image you posted looks to me like browser console output and is entirely
   unrelated to WP.
 * Exactly where in WP did you enable this Advanced CSS controls anyway?
 *  Thread Starter [raccoondog](https://wordpress.org/support/users/raccoondog/)
 * (@raccoondog)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/additional-css-live-preview-stopped-working/#post-16635469)
 * Bravo, bcworkz – good catch! “The Advanced CSS controls” options disappeared 
   when JetPack was deactivated, and the CSS Editor live-preview now functions as
   it did before. 
   I recall that the enable checkbox was in Dashboard > Appearance
   > Additional CSS > Advanced CSS controls. Yes, this anomalous “Additional CSS”
   was a sister to Customize. It appeared only at the root site, and not in the 
   sub-sites, and it disappeared after “Advanced…” was enabled. I’m not convinced
   that we even need JetPack. It was added by the person who installed the multisite
   for us. I suspect the bug appeared via an auto-update.

Viewing 4 replies - 1 through 4 (of 4 total)

 The topic ‘Additional CSS live-preview stopped working’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 4 replies
 * 2 participants
 * Last reply from: [raccoondog](https://wordpress.org/support/users/raccoondog/)
 * Last activity: [3 years, 6 months ago](https://wordpress.org/support/topic/additional-css-live-preview-stopped-working/#post-16635469)
 * Status: resolved

## Topics

### Topics with no replies

### Non-support topics

### Resolved topics

### Unresolved topics

### All topics