Error:


Traceback:
TypeError: Cannot read property 'length' of undefined
    at Class.areOptionsShown (http://127.0.0.1:8069/web/content/661-d6e8200/1/web_editor.assets_wysiwyg.js:621:619)
    at Class.closeWidgets (http://127.0.0.1:8069/web/content/661-d6e8200/1/web_editor.assets_wysiwyg.js:623:213)
    at http://127.0.0.1:8069/web/content/661-d6e8200/1/web_editor.assets_wysiwyg.js:679:899
    at Array.forEach (<anonymous>)
    at Class._closeWidgets (http://127.0.0.1:8069/web/content/661-d6e8200/1/web_editor.assets_wysiwyg.js:679:876)
    at Class._updateLeftPanelContent [as _super] (http://127.0.0.1:8069/web/content/661-d6e8200/1/web_editor.assets_wysiwyg.js:703:211)
    at Class._updateLeftPanelContent (http://127.0.0.1:8069/web/content/663-9ef15cb/1/website.assets_wysiwyg.js:6:825)
    at Class._updateLeftPanelContent (http://127.0.0.1:8069/web/content/657-1a56656/1/web.assets_common_lazy.js:4431:371)
    at Class._onUpdateCustomizeElements (http://127.0.0.1:8069/web/content/661-d6e8200/1/web_editor.assets_wysiwyg.js:709:81)
    at Class.<anonymous> (http://127.0.0.1:8069/web/content/657-1a56656/1/web.assets_common_lazy.js:4533:11)