Title: NPBuilder DevTools error 404
Last modified: April 19, 2022

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# NPBuilder DevTools error 404

 *  Resolved [Roland](https://wordpress.org/support/users/bl4d30r/)
 * (@bl4d30r)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/npbuilder-devtools-error-404/)
 * Dear Support of NPB
 * * the ContentPicker stays empty
 * I deactivated all plugins and reactivated them one by one. When I re-enabled 
   one particular plugin, the NPB worked again. I leave this said plugin disabled
   and try to enable all other plugins one by one.
    And again with some plugins 
   the NPB does not work anymore.
 * I have the Health&Troubleshoot plugin so a conflict test can be done.
 * Now I am confused -> If I refresh the page with F5 in the NPB, it sometimes works–
   if I refresh again with F5 -> it works again non- *the ContentPicker stays empty.
 * The following error is displayed in the browser console:
 * DevTools failed to load source map: Could not load content for [https://fv-wohlensee.ch/wordpress/wp-content/plugins/nimble-builder/assets/front/js/libs/swiper-bundle.min.js.map](https://fv-wohlensee.ch/wordpress/wp-content/plugins/nimble-builder/assets/front/js/libs/swiper-bundle.min.js.map):
   HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
 * Could there be a problem on the server side?
    I am puzzled by the 404 status 
   code. Or does this error message have nothing to do with that?
 * I am using NPB-PRO.
 * Kind regards,
    Roland
    -  This topic was modified 4 years, 1 month ago by [Roland](https://wordpress.org/support/users/bl4d30r/).
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fnpbuilder-devtools-error-404%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

 *  Thread Starter [Roland](https://wordpress.org/support/users/bl4d30r/)
 * (@bl4d30r)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/npbuilder-devtools-error-404/#post-15570106)
 * ### Begin System Info (Generated 2022-04-19 07:43:05) ###
    ———— SITE INFO Site
   URL: [https://fv-wohlensee.ch/wordpress](https://fv-wohlensee.ch/wordpress) Home
   URL: [https://fv-wohlensee.ch/wordpress](https://fv-wohlensee.ch/wordpress) Multisite:
   No
 * ———— USER BROWSER
    Platform: Windows Browser Name: Chrome Browser Version: 100.0.4896.88
 * ———— WORDPRESS CONFIG
    WP Version: 5.9.3 Language: de_DE Permalink Structure:/%
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   www/vhosts/fv-wohlensee.ch/httpdocs/wordpress/ WP_DEBUG: Disabled WP Memory Limit:
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 * ———— NIMBLE CONFIGURATION
    Version: 3.2.7 Upgraded From: 3.2.5 Started With: 
   1.7.7
 * ———— NIMBLE PRO CONFIGURATION
    Pro Version: 1.0.17 Pro Upgraded From: None Pro
   started With: 1.0.17
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   Theme Editor: 2.7 UpdraftPlus – Backup/Restore: 2.22.11.25 WC Multiple Email 
   Recipients: 1.4.0 Webling: 3.7.1 WooCommerce: 6.4.1 WooCommerce Cash On Pickup:
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   PDF Invoices & Packing Slips: 2.14.4 WP Adverts: 1.5.8 WP Adverts – Custom Fields:
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 * ———— WP INACTIVE PLUGINS
 * ———— WEBSERVER CONFIG
    PHP Version: 7.3.33 MySQL Version: 5.5.5 Webserver Info:
   Apache Write/Read permissions: OK
 * ———— PHP CONFIG
    Memory Limit: 512M Upload Max Size: 256M Post Max Size: 512M
   Upload Max Filesize: 256M Time Limit: 6000 Max Input Vars: 5000 Display Errors:
   On (1) PHP Arg Separator: & PHP Allow URL File Open: 1
 * ### End System Info ###
 *  Thread Starter [Roland](https://wordpress.org/support/users/bl4d30r/)
 * (@bl4d30r)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/npbuilder-devtools-error-404/#post-15570273)
 * I have now found out that this plugin “Timely All-in-One Events Calendar” leads
   to the problem in connection with NPB.
    Has this already been detected and can
   this be fixed by them?
 * BR Roland
 *  Plugin Author [presscustomizr](https://wordpress.org/support/users/nikeo/)
 * (@nikeo)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/npbuilder-devtools-error-404/#post-15570467)
 * Hi [@bl4d30r](https://wordpress.org/support/users/bl4d30r/) I looked into this
   and it appears to me that you are correct that it is a conflict with the plugin
   you mentioned. If you check that plugin, the last 8 reviews are all 1-star, and
   the forums show a number of timeout issues (404 error), CSS loading issues, site
   crashing, etc.
 * Since it appears to be part of that plugin and impacting other sites that are
   not using Nimble Builder, I think it is something that development team is going
   to need to work on. I won’t be able to fix their plugin, of course. We’ll definitely
   have a look at it during our next upgrade to see if we can do anything to help
   though.
 * Thanks for the update!
 *  Thread Starter [Roland](https://wordpress.org/support/users/bl4d30r/)
 * (@bl4d30r)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/npbuilder-devtools-error-404/#post-15570639)
 * Thanks for the support!
 * Kind regards

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

The topic ‘NPBuilder DevTools error 404’ is closed to new replies.

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 * 4 replies
 * 2 participants
 * Last reply from: [Roland](https://wordpress.org/support/users/bl4d30r/)
 * Last activity: [4 years, 1 month ago](https://wordpress.org/support/topic/npbuilder-devtools-error-404/#post-15570639)
 * Status: resolved