Title: Core web vitals error
Last modified: March 16, 2023

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# Core web vitals error

 *  Resolved [yondermann](https://wordpress.org/support/users/yondermann/)
 * (@yondermann)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/)
 * Hi,
 * There is an error in Google’s core web vitals for mobile: Browser errors were
   logged to the console:
 * …litespeed-cache/guest.vary.php:1:0(www.suncakemom.com)Failed to load resource:
   the server responded with a status of 403 (Forbidden)/treats/chimney-cake-recipe:
   1:0(www.suncakemom.com)SyntaxError: Unexpected token ‘<‘, “<!DOCTYPE “… is not
   valid JSON
 * A report was sent in
 * **ANHCAUCH**
 * Thanks!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcore-web-vitals-error%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 7 replies - 1 through 7 (of 7 total)

 *  [serpentdriver](https://wordpress.org/support/users/serpentdriver/)
 * (@serpentdriver)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/#post-16566225)
 * If you have any security plugin installed this plugin causes the issue and prevents
   access to guest.vary.php.
 *  Thread Starter [yondermann](https://wordpress.org/support/users/yondermann/)
 * (@yondermann)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/#post-16569001)
 * There is antispam bee and loginizer installed. If antispam bee is deactivated
   nothing happens. If Loginizer is deactivated the same error is still logged with
   the only difference that there are a bunch of .js errors also being logged. The
   cache is purged after each activation and deactivation.
 *  [serpentdriver](https://wordpress.org/support/users/serpentdriver/)
 * (@serpentdriver)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/#post-16569024)
 * I can only tell you that “something” in your WP installation is blocking the 
   guest.vary.php request. You have to find out what that is for yourself. The guest.
   vary.php is needed in any case for the Guestmode.
 *  Thread Starter [yondermann](https://wordpress.org/support/users/yondermann/)
 * (@yondermann)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/#post-16569045)
 * So you say if this isn’t solved then enabling guest mode and guest optimization
   has no effect whatsoever?
 *  [serpentdriver](https://wordpress.org/support/users/serpentdriver/)
 * (@serpentdriver)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/#post-16569066)
 * That means if something blocks guest.vary.php the Guestmode doesn’t work.
    -  This reply was modified 3 years, 2 months ago by [serpentdriver](https://wordpress.org/support/users/serpentdriver/).
    -  This reply was modified 3 years, 2 months ago by [serpentdriver](https://wordpress.org/support/users/serpentdriver/).
 *  Thread Starter [yondermann](https://wordpress.org/support/users/yondermann/)
 * (@yondermann)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/#post-16569102)
 * That blog post says nothing about why google mobile bot is incompatible with 
   guest mode.
   The speed scores are mostly fine. This is only a best practices error
   which doesn’t really impact anything probably. Still it would be nice to eliminate
   it.
 *  [serpentdriver](https://wordpress.org/support/users/serpentdriver/)
 * (@serpentdriver)
 * [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/#post-16569125)
 * This issue has nothing to do with Google. As I said, something on your server
   is blocking the request to guest.vary.php. Most of the time this is caused by
   some security plugins. In the end you have to find the cause yourself. In any
   case, the problem is not a cache plugin problem.

Viewing 7 replies - 1 through 7 (of 7 total)

The topic ‘Core web vitals error’ is closed to new replies.

 * ![](https://ps.w.org/litespeed-cache/assets/icon-256x256.png?rev=2554181)
 * [LiteSpeed Cache](https://wordpress.org/plugins/litespeed-cache/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/litespeed-cache/#faq)
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 * 7 replies
 * 2 participants
 * Last reply from: [serpentdriver](https://wordpress.org/support/users/serpentdriver/)
 * Last activity: [3 years, 2 months ago](https://wordpress.org/support/topic/core-web-vitals-error/#post-16569125)
 * Status: resolved