Title: Why does Classic Widget fix JSON-error?
Last modified: September 21, 2023

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# Why does Classic Widget fix JSON-error?

 *  [aegirr](https://wordpress.org/support/users/aegirr/)
 * (@aegirr)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/)
 * I am trying to understand this error:
 * “Updating failed. The response is not a valid JSON response”
 * I have tried several procedures but the only thing that works is installing and
   activating Classic Widget. For me this is not optimal.
 * So can someone explain to me why Classic Widges fixes the JSON-error?

Viewing 11 replies - 1 through 11 (of 11 total)

 *  [aqit79](https://wordpress.org/support/users/aqit79/)
 * (@aqit79)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17068941)
 * I had the same error as you, I solved it by turning off modsecurity
 *  Thread Starter [aegirr](https://wordpress.org/support/users/aegirr/)
 * (@aegirr)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17068963)
 * What is modsecurity? Is it a WordPress plugin og something you configure elsewhere?
 *  [jersnav](https://wordpress.org/support/users/jersnav/)
 * (@jersnav)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17069017)
 * Thanks [@aqit79](https://wordpress.org/support/users/aqit79/) ! Turning off modsecurity
   stopped the problem for me too. This started yesterday for me. I turned modsecurity
   back on and the problem came back (cpanel warns me not to leave modsecurity off
   except for testing). I can use the classic editor for now.
 *  [aqit79](https://wordpress.org/support/users/aqit79/)
 * (@aqit79)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17069025)
 * If you have a server admin, check rules 77140964 of imunify360
 *  Thread Starter [aegirr](https://wordpress.org/support/users/aegirr/)
 * (@aegirr)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17069108)
 * Ok, I have now deactivated modsecurity, and now the error is gone, but this should
   only be a temporary solution. The problem is not solved.
 *  Thread Starter [aegirr](https://wordpress.org/support/users/aegirr/)
 * (@aegirr)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17069398)
 * Wow, this issue has actually been fixed. No more JSON-errors when saving a post!
   But it would be nice to get more background information about this should this
   happen in the future. Do not mark this as resolved. Why did this happen, please!
 *  [egzaltowana](https://wordpress.org/support/users/egzaltowana/)
 * (@egzaltowana)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17069616)
 * Can you tell me how the issue has been fixed? I have the same problem and use
   classic editor plug in to cope with it.
 *  Thread Starter [aegirr](https://wordpress.org/support/users/aegirr/)
 * (@aegirr)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17069711)
 * egzaltowana: Try to drop classic editor and see if it works without now. I dont
   know how or why this works now. Noone seems to know.
 *  [egzaltowana](https://wordpress.org/support/users/egzaltowana/)
 * (@egzaltowana)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17069782)
 * Unfortunately without classic editor I am not able to edit anything 🙁 I hope
   they will fix it in the next update!
 *  Moderator [Yui](https://wordpress.org/support/users/fierevere/)
 * (@fierevere)
 * 永子
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17073333)
 * if you are experiencing a bug with WordPress which is reproduced with clean installation
   and default theme, please fill a trac ticket
 * [https://core.trac.wordpress.org](https://core.trac.wordpress.org)
 *  Thread Starter [aegirr](https://wordpress.org/support/users/aegirr/)
 * (@aegirr)
 * [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17074568)
 * Yui: This time the “problem” is that the bug is being fixed, so it cannot be 
   reproduced. I would like to know what caused the JSON-error, so that I can be
   prepaired next time is happens. Or maybe I should just wait for the bug to be
   solved “by itselv”?
 * By the way, why was my last comment deleted?

Viewing 11 replies - 1 through 11 (of 11 total)

The topic ‘Why does Classic Widget fix JSON-error?’ is closed to new replies.

## Tags

 * [Failed](https://wordpress.org/support/topic-tag/failed/)
 * [json](https://wordpress.org/support/topic-tag/json/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 16 replies
 * 5 participants
 * Last reply from: [aegirr](https://wordpress.org/support/users/aegirr/)
 * Last activity: [2 years, 8 months ago](https://wordpress.org/support/topic/why-does-classic-widget-fix-json-error/#post-17074568)
 * Status: not resolved

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