Title: Consistent 404 errors
Last modified: January 24, 2019

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# Consistent 404 errors

 *  [lukefive](https://wordpress.org/support/users/lukefive/)
 * (@lukefive)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/consistent-404-errors/)
 * We’ve been seeing 404 errors since installing MMR. Typically, a dynamic CSS file
   created by MMR will generate a 404 early in the waterfall, followed by a second
   error for that same file farther down in the page load. Is this to be expected?

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

 *  Plugin Author [launchinteractive](https://wordpress.org/support/users/launchinteractive/)
 * (@launchinteractive)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/consistent-404-errors/#post-11128995)
 * No, thats not expected behaviour at all. I’m guessing another plugin is conflicting
   with MMR or your have a CDN that is caching the HTML and linking to the old file.
   Could either of these be the cause?
 *  Thread Starter [lukefive](https://wordpress.org/support/users/lukefive/)
 * (@lukefive)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/consistent-404-errors/#post-11131385)
 * We are still building our CDN. Are there known plugin conflicts?
    I at first 
   thought it was MMR because of the path … `https://example.com/wp-content/mmr/
   5d023f02-1545240768.min.css`
 *  Plugin Author [launchinteractive](https://wordpress.org/support/users/launchinteractive/)
 * (@launchinteractive)
 * [7 years, 4 months ago](https://wordpress.org/support/topic/consistent-404-errors/#post-11141937)
 * Potentially.
    On a page load MMR schedules minification using wp-cron and outputs
   a non-minified url. Once the cron has run the url will update. If your CDN caches
   the HTML with the first url then it won’t request the updated minified code.
 * Does that make sense?
 * There is a plugin by Andrew Minion that works around this issue that might be
   helpful: [https://wordpress.org/plugins/merge-minify-refresh-clear-caches/](https://wordpress.org/plugins/merge-minify-refresh-clear-caches/)
 *  [Achim Kirchmeier](https://wordpress.org/support/users/kirchmeier/)
 * (@kirchmeier)
 * [7 years, 3 months ago](https://wordpress.org/support/topic/consistent-404-errors/#post-11164940)
 * Hi!
    I’m getting there Errors as well. I can delete caches, then it will work
   for a while. But after a few days i’ll have the same result as now: [https://www.top-wp-hosting.de/wordpress-hosting-vergleich/](https://www.top-wp-hosting.de/wordpress-hosting-vergleich/)
   Clear-Caches-Plugin is installed, for Page-Caching i’m using Hummingbird. I’m
   not using any CDN. In Chromes Console there are 404-errors. What can be done?
   Best regards! Achim
    -  This reply was modified 7 years, 3 months ago by [Achim Kirchmeier](https://wordpress.org/support/users/kirchmeier/).

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

The topic ‘Consistent 404 errors’ is closed to new replies.

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 * 4 replies
 * 3 participants
 * Last reply from: [Achim Kirchmeier](https://wordpress.org/support/users/kirchmeier/)
 * Last activity: [7 years, 3 months ago](https://wordpress.org/support/topic/consistent-404-errors/#post-11164940)
 * Status: not resolved