Title: Preload error Last modified: April 9, 2020 --- # Preload error * Resolved [swizzin](https://wordpress.org/support/users/swizzin/) * (@swizzin) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/) * Got this error when running the “preload” * function (){return f&&(c&&!b&&(h=f.length-1,g.push(c)),function b(c){n.each(c, function(c,d){n.isFunction(d)?a.unique&&j.has(d)||f.push(d):d&&d.length&&”string”! ==n.type(d)&&b(d)})}(arguments),c&&!b&&i()),this} Viewing 15 replies - 1 through 15 (of 17 total) 1 [2](https://wordpress.org/support/topic/preload-error-3/page/2/?output_format=md&view=all) [→](https://wordpress.org/support/topic/preload-error-3/page/2/?output_format=md&view=all) * [maxjanso](https://wordpress.org/support/users/maxjanso/) * (@maxjanso) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/#post-12654407) * Same thing here. I think it started to happen after last update as before it was working. Any advice please. * [Marc Lacroix](https://wordpress.org/support/users/marcusig/) * (@marcusig) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/#post-12654935) * Hi there, * I’m not sure why this happens. Could you open your browser console ([how to](https://documentation.concrete5.org/tutorials/how-open-browser-console-view-errors)), try again, and see if there’s a javascript error? * Also could you share the list of plugins active on your website? * Best, Marc. * [philho1810](https://wordpress.org/support/users/philho1810/) * (@philho1810) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/#post-12655860) * Hi Marc, same issue for me since last update… see below : * p?page=WP-Optimize&wpo_all_pages_cache_purged=1:467 Uncaught TypeError: Cannot read property ‘dispatch’ of undefined at admin.php?page=WP-Optimize&wpo_all_pages_cache_purged =1:467 at admin.php?page=WP-Optimize&wpo_all_pages_cache_purged=1:474 (anonymous) @ admin.php?page=WP-Optimize&wpo_all_pages_cache_purged=1:467 (anonymous) @ admin. php?page=WP-Optimize&wpo_all_pages_cache_purged=1:474 load (async) (anonymous) @ admin.php?page=WP-Optimize&wpo_all_pages_cache_purged=1:465 * Thread Starter [swizzin](https://wordpress.org/support/users/swizzin/) * (@swizzin) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/#post-12655908) * [@marcusig](https://wordpress.org/support/users/marcusig/) Here’s what I got: * ?v=2.0:6 WebSocket connection to ‘wss://public-api.wordpress.com/pinghub/wpcom/ me/newest-note-data’ failed: Error during WebSocket handshake: Unexpected response code: 403 v @ ?v=2.0:6 2 DevTools failed to parse SourceMap: chrome-extension:// hdokiejnpimakedhajhdlcegeplioahd/sourcemaps/onloadwff.js.map * [Marc Lacroix](https://wordpress.org/support/users/marcusig/) * (@marcusig) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/#post-12670073) * Hi there, * Could you share the list of plugins on your sites? I can’t reproduce this, so I’m wondering if it’s a plugin conflicting. * Marc. * [philho1810](https://wordpress.org/support/users/philho1810/) * (@philho1810) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/#post-12670667) * Hi Marc, here they are : Akismet Anti-Spam (4.1.4), All In One WP Security ( 4.4.3), Easy FancyBox (1.8.18), Easy FancyBox – Pro extension (1.8.1), Forum_wordpress_fr( 4.2), GDPR Cookie Consent (1.8.7), iMaginem Events r5 (1.1), iMaginem Fullscreen Post Creater r4 (1.1), iMaginem Pagebuilder r6 (1.8), iMaginem Photo Proofing r4 (1.1), iMaginem Portfolio Creator r5 (1.1), iMaginem Shortcodes Generator r11 (2.8), iMaginem Widget Set r9 (1.1), Media Library Assistant (2.83), Ninja Forms (3.4.24.1), PHP Compatibility Checker (1.5.0), Simple Page Ordering (2.3.4), SVG Support (2.3.18), UpdraftPlus – Backup/Restore (1.16.23), WP-Optimize – Clean, Compress, Cache (3.0.19), WP Original Media Path (2.4.0), Yoast SEO (13.4.1) ( note that svg support was installed after the issue) Have a good day - This reply was modified 6 years, 1 month ago by [philho1810](https://wordpress.org/support/users/philho1810/). * Thread Starter [swizzin](https://wordpress.org/support/users/swizzin/) * (@swizzin) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/#post-12671840) * [@marcusig](https://wordpress.org/support/users/marcusig/) * Address Autocomplete Using Google Place API Akismet Anti-Spam Astra Pro Classic Editor Envato Market Export Media Library Glue for Yoast SEO & AMP Ivory Search Jetpack by WordPress.com Official Facebook Pixel One Click Demo Import Query Monitor Really Simple SSL Site Kit by Google Slider Revolution TablePress Thrive Architect Thrive Leads Thrive Product Manager UpdraftPlus – Backup/Restore VaultPress W3 Total Cache WP Google My Business Auto Publish WP Mail SMTP WP Staging Pro WPC Pexels WPForms WPForms Custom Captcha WP-Optimize – Clean, Compress, Cache Yoast SEO * [arasa](https://wordpress.org/support/users/marksat/) * (@marksat) * [6 years, 1 month ago](https://wordpress.org/support/topic/preload-error-3/#post-12680112) * Content Views * Query and display posts, pages in awesome layouts (grid, scrollable list, collapsible list) easier than ever, without coding! Version 2.3.2 | By Content Views | View details * Duplicator * Migrate and backup a copy of your WordPress files and database. Duplicate and move a site from one location to another quickly. Version 1.3.28 | By Snap Creek | View details | Go Pro * Google Analytics Dashboard for WP (GADWP) Displays Google Analytics Reports and Real-Time Statistics in your Dashboard. Automatically inserts the tracking code in every page of your website. Version 6.0.2 | By ExactMetrics | View details * Jetpack by WordPress.com Bring the power of the WordPress.com cloud to your self-hosted WordPress. Jetpack enables you to connect your blog to a WordPress. com account to use the powerful features normally only available to WordPress. com users. Version 8.4.1 | By Automattic | View details * Mailjet for WordPress The Best WordPress Plugin For Email Newsletters. Version 5.2.1 | By Mailjet SAS | View details * MainWP Child Provides a secure connection between your MainWP Dashboard and your WordPress sites. MainWP allows you to manage WP sites from one central location. Plugin documentation and options can be found here [https://mainwp.com/help/](https://mainwp.com/help/) * Redirection Manage all your 301 redirects and monitor 404 errors Version 4.7.1 | By John Godley | View details * Sucuri Security – Auditing, Malware Scanner and Hardening Deactivate The Sucuri plugin provides the website owner the best Activity Auditing, SiteCheck Remote Malware Scanning, Effective Security Hardening and Post-Hack features. SiteCheck will check for malware, spam, blacklisting and other security issues like .htaccess redirects, hidden eval code, etc. The best thing about it is it’s completely free. Version 1.8.24 | By Sucuri Inc. | View details * Two Factor Two-Factor Authentication using time-based one-time passwords, Universal 2nd Factor (FIDO U2F), email and backup verification codes. Version 0.5.1 | By Plugin Contributors | View details * Ultimate Addons for Gutenberg The Ultimate Addons for Gutenberg extends the Gutenberg functionality with several unique and feature-rich blocks that help build websites faster. * Version 1.14.8 | By Brainstorm Force | View details * UpdraftPlus – Backup/Restore Add-Ons / Pro Support | Settings | Deactivate | Take Tour Backup and restore: take backups locally, or backup to Amazon S3, Dropbox, Google Drive, Rackspace, (S)FTP, WebDAV & email, on automatic schedules. * Version 1.16.23 | By UpdraftPlus.Com, DavidAnderson | View details * Wordfence Security Upgrade To Premium | Deactivate Wordfence Security – Anti- virus, Firewall and Malware Scan * Version 7.4.6 | By Wordfence | View details Select WP-Optimize – Clean, Compress, Cache WP-Optimize – Clean, Compress, Cache * WP-Optimize makes your site fast and efficient. It cleans the database, compresses images and caches pages. Fast sites attract more traffic and users. * Version 3.0.19 | By David Anderson, Ruhani Rabin, Team Updraft | View details Select Yoast SEO Yoast SEO * [shishking](https://wordpress.org/support/users/shishking/) * (@shishking) * [6 years ago](https://wordpress.org/support/topic/preload-error-3/#post-12747065) * I am having the same issue: * function(){return f&&(c&&!b&&(h=f.length-1,g.push(c)),function b(c){n.each(c, function(c,d){n.isFunction(d)?a.unique&&j.has(d)||f.push(d):d&&d.length&&”string”! ==n.type(d)&&b(d)})}(arguments),c&&!b&&i()),this} * [philho1810](https://wordpress.org/support/users/philho1810/) * (@philho1810) * [6 years ago](https://wordpress.org/support/topic/preload-error-3/#post-12747265) * Hi Marc, nothing new ? Still the same pb, wainting for an update & just using another plugin to do the job now, but… Have a good week ! * [shishking](https://wordpress.org/support/users/shishking/) * (@shishking) * [6 years ago](https://wordpress.org/support/topic/preload-error-3/#post-12747290) * Which plugin are you now using? * [philho1810](https://wordpress.org/support/users/philho1810/) * (@philho1810) * [6 years ago](https://wordpress.org/support/topic/preload-error-3/#post-12747328) * Hi, PageSpeed Ninja, for free… * [shishking](https://wordpress.org/support/users/shishking/) * (@shishking) * [6 years ago](https://wordpress.org/support/topic/preload-error-3/#post-12747343) * Thanks I’ll look into that * [philho1810](https://wordpress.org/support/users/philho1810/) * (@philho1810) * [6 years ago](https://wordpress.org/support/topic/preload-error-3/#post-12787249) * Hi, I just noticed responsive display no longer works on phones since I’m using PageSpeed Ninja (I turned it off to be sure, all was ok) 🙁 I uninstalled it& I’m looking for another solution : if anyone have one… * [Marc Lacroix](https://wordpress.org/support/users/marcusig/) * (@marcusig) * [6 years ago](https://wordpress.org/support/topic/preload-error-3/#post-12788158) * Hi there, * A couple of things: * – We have a fix for the displayed error: * `function(){return f&&(c&&!b&&(h=f.length-1,g.push(c)),function b(c){n.each(c, function(c,d){n.isFunction(d)?a.unique&&j.has(d)||f.push(d):d&&d.length&&”string”! ==n.type(d)&&b(d)})}(arguments),c&&!b&&i()),this}` * BUT this is a sign of an other error on the server. We’ve done a few tweaks on the preload side, which might just fix everything, but could you look in your PHP error log (their location depends on your hosting)? * – Also an other note, other reports were done of this, but the preload actually works, and starts a few seconds after (so it might only be a cosmetic error). * – FYI, The next release is being held up by a new feature that requires more testing before being released. * Best, Marc. Viewing 15 replies - 1 through 15 (of 17 total) 1 [2](https://wordpress.org/support/topic/preload-error-3/page/2/?output_format=md&view=all) [→](https://wordpress.org/support/topic/preload-error-3/page/2/?output_format=md&view=all) The topic ‘Preload error’ is closed to new replies. * ![](https://ps.w.org/wp-optimize/assets/icon-256x256.png?rev=1552899) * [WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance](https://wordpress.org/plugins/wp-optimize/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-optimize/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-optimize/) * [Active Topics](https://wordpress.org/support/plugin/wp-optimize/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-optimize/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-optimize/reviews/) ## Tags * [preload](https://wordpress.org/support/topic-tag/preload/) * 17 replies * 7 participants * Last reply from: [bcrodua](https://wordpress.org/support/users/bcrodua/) * Last activity: [5 years, 12 months ago](https://wordpress.org/support/topic/preload-error-3/page/2/#post-12865729) * Status: resolved