u/No-Quality9399

Hi everyone, I would appreciate getting some help from you.
Avada Builder suddenly stopped working across my WordPress site and I’m trying to figure out what issue this is and how to fix it.

The frontend website still works perfectly and all page content exists - Fusion Builder shortcodes are still visible in the text editor. But Avada Builder either spins forever or shows a popup with an error message. The Default Editor also mostly doesn’t respond.

I firstly tried to deactivate unnecessary plugins one by one, but Avada Builder still fails to initialize across pages. I also reset Avada cache and hard refreshed. Still no luck.

Avada version is V7.7.1

Has anyone seen this before and do you have any suggestions what I should do?

Browser console shows these errors:

[Error] TypeError: _.isArray is not a function. (In '_.isArray(t)', '_.isArray' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: _.debounce is not a function. (In '_.debounce( self._refreshPaletteGlobalColors, 500 )', '_.debounce' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: _.debounce is not a function. (In '_.debounce(s,1e3)', '_.debounce' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: F._.throttle is not a function. (In 'F._.throttle(function(){var t=F.scrollX||document.documentElement.scrollLeft,e=F.scrollY||document.documentElement.scrollTop,o=parseInt(i.style.height,10);i.style.height=Y+"px",i.scrollHeight>Y&&(i.style.height=i.scrollHeight+"px"),void 0!==t&&F.scrollTo(t,e),i.scrollHeight<o&&p()},300)', 'F._.throttle' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: _.extend is not a function. (In '_.extend(g,window._wpUpdatesItemCounts||{})', '_.extend' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: _.each is not a function. (In '_.each(patcherVars.args,function(a){var e,t,p;void 0!==patcherVars.patches[a.context]&&0<patcherVars.patches[a.context]&&"none"!==patcherVars.display_counter&&(e=jQuery("#adminmenu .toplevel_page_"+a.parent_slug+" .wp-menu-name"),t=jQuery("#adminmenu .toplevel_page_"+a.parent_slug+' ul.wp-submenu li a[href="admin.php?page='+a.context+'-patcher"]'),p='<span class="avada-patches-count update-plugins count-'+patcherVars.patches[a.context]+'" style="background-color:#65bc7b;margin-left:5px;"><span class="plugin-count">'+patcherVars.patches[a.context]+"</span></span>","sub_level"!==patcherVars.display_counter&&jQuery(p).appendTo(e),"top_level"!==patcherVars.display_counter&&(jQuery(p).appendTo(t),jQuery(p).appendTo(jQuery(".avada-db-menu-sub-item-patcher .avada-db-menu-sub-item-label"))),jQuery(".avada-db-maintenance-counter").show())})', '_.each' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: _.sortBy is not a function. (In '_.sortBy(fusionAllElements,function(e){return e.name.toLowerCase()})', '_.sortBy' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: _.extend is not a function. (In '_.extend(FusionPageBuilder.ElementSettingsView.prototype,FusionPageBuilder.options.fusionDynamicData)', '_.extend' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: _.memoize is not a function. (In '_.memoize(function(e){return new RegExp("\\[(\\[?)("+e+")(?![\\w-])([^\\]\\/]*(?:\\/(?!\\])[^\\]\\/]*)*?)(?:(\\/)\\]|\\](?:([^\\[]*(?:\\[(?!\\/\\2\\])[^\\[]*)*)(\\[\\/\\2\\]))?)(\\]?)")})', '_.memoize' is undefined)
(anonymous function) (jquery.min.js:2:31711)
[Error] ReferenceError: Can't find variable: FusionPageBuilderApp
(anonymous function) (jquery.min.js:2:31711)
[Error] TypeError: _.each is not a function. (In '_.each(n,function(e,i){void 0===fusionAllElements.fusion_widget.params.type.value[i]&&jQuery.map(fusionAllElements.fusion_widget.params.type.value,function(t,o){t===e.name&&(e.title=o,n[o]=e,n[i].delete)})})', '_.each' is undefined)
(anonymous function) (fusion-builder.js:1:130617)
c (jquery.min.js:2:28333)
fireWith (jquery.min.js:2:29074)
l (jquery.min.js:2:79913)
(anonymous function) (jquery.min.js:2:82357)