Customize stuck on loading page

Which resources are failing to load?

Can you post a screenshot? Did you also disable the theme?

The whole customize editor menu, when clicking on it the screen looks as though it’s loading but then stops before anything comes up.

How can I post a screenshot?

And yes I tried disabling the theme and changing it but it’s still not working.

Thanks

How can I post a screenshot?

Host the image somewhere and post the link here.

Even all plugins?

Hi,

Screenshot – https://ibb.co/ig7pac

Yes I have tried disabling plugins and still no luck

ive got the same problm here. did you found a solution?

my log in developer console in chrome:

 "TypeError: Cannot set property 'parent' of undefined"
load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10 Uncaught TypeError: Cannot read property '_dirty' of undefined
    at Function.<anonymous> (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10)
    at load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:7
    at Function.each (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:2)
    at Function.each (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:7)
    at Function.f.dirtyValues (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10)
    at f.query (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:11)
    at f.refresh (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:11)
    at f.<anonymous> (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:11)
    at c (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:5)
(anonymous) @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10
(anonymous) @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:7
each @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:2
each @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:7
f.dirtyValues @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10
query @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:11
refresh @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:11
(anonymous) @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:11
c @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:5
setTimeout (async)
(anonymous) @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:5
(anonymous) @ load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:11
i @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:2
fireWith @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:2
ready @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:2
K @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:2
load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10 Uncaught TypeError: Cannot read property '_dirty' of undefined
    at Function.<anonymous> (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10)
    at load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:7
    at Function.each (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:2)
    at Function.each (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:7)
    at Function.f.dirtyValues (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10)
    at Function.f.requestChangesetUpdate (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:10)
    at c (load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:12)
    at load-scripts.php?c=1&load[]=underscore,customize-base,wp-a11y,wp-util,customize-controls,backbone,wp-backbone,customize-widgets,accordion,customize-nav-menu&load[]=s,jquery-ui-slider,jquery-touch-punch,iris,wp-color-picker,imgareaselect,customize-models,shortcode,media-models,wp-plupload,med&load[]=iaelement,wp-mediaelement,media-views,media-editor,customize-views,media-audiovideo,mce-view,image-edit&ver=4.7.10:12
    at dispatch (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:3)
    at r.handle (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-drop&load[]=pable,wp-ajax-response,jquery-color,wp-lists,postbox,nav-menu,utils,plupload&ver=4.7.10:3)

Try disabling any third party theme/plugin and check if the problem persist.

the default wordpress theme ‘Seventeen’ is working…, theme ‘customizr’ is causing the problem

Contact the Customizr Theme developer about the issue.