[wp-trac] [WordPress Trac] #57521: Appearance -» Customize not working after update 5.8

[WordPress Trac]

#57521: Appearance -» Customize not working after update 5.8
-------------------------------+------------------------------
 Reporter:  va2m               |       Owner:  (none)
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:  Awaiting Review
Component:  Customize          |     Version:
 Severity:  normal             |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:
-------------------------------+------------------------------

Comment (by va2m):

 Hi @dlh,
 below is the console log errors that appears in the browser developer
 tools on WordPress 6.1:

 {{{
 [Error] TypeError: o.addEventListener is not a function. (In
 'o.addEventListener("change",function(e){r=e.matches})',
 'o.addEventListener' is undefined)
     (anonymous function) (load-scripts.php:6:132)
     Global Code (load-scripts.php:6:111570)
 [Error] TypeError: undefined is not an object (evaluating
 'c.Panel.extend')
     (anonymous function) (customize-nav-menus.min.js:2:10946)
     Global Code (customize-nav-menus.min.js:2:45539)
 [Error] TypeError: The superclass is not an object.
     Le (customize-widgets.min.js:7:33584)
     Ue (customize-widgets.min.js:7:37742)
     (anonymous function) (customize.php:1680)
 }}}

 and, below is the console log errors that appears in the browser developer
 tools on WordPress 5.7:


 {{{
 [Error] Failed to load resource: the server responded with a status of
 404()(default -image.jpg, line 0)
 [Error] Error while parsing the 'sandbox' attribute: 'allow-orientation-
 lock', 'allow-presentation' are invalid sandbox flags.
     attr(load - scripts.php: 2: 65772)
 $(load - scripts.php: 2: 32476)
 run(load - scripts.php: 6: 70603)
 initialize(load - scripts.php: 6: 69849)
     (anonymous function)(load - scripts.php: 4: 573)
     (anonymous function)(load - scripts.php: 4: 186)
     (anonymous function)(load - scripts.php: 4: 186)
 refresh(load - scripts.php: 6: 75158)
     (anonymous function)(load - scripts.php: 6: 72466)
 f(underscore.min.js: 2: 8438)
 }}}

 Thanks for the help!

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/57521#comment:2>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform