Wordpress update cause visual editor blank

Question

I updated my wordpress website version with 3.9.2. After updating when i try to add or update any page or post, visual editor tab shows blank. It does not display toolbar buttons or page or post content. Text tab works fine

I tried following solutions provided on different sites with no luck

1) clear browser cache

2) deactivating all plugins

3) change to default theme and again change to desired one

The people who had the same issue had cured the problem by doing one of these suggestions:

1) Install “Use Google Libraries” plugin

2) Add to your wp-config.php file:

define( ‘CONCATENATE_SCRIPTS’, false );

3) Download a refresh version of WordPress from WordPress.org and via ftp replace /wp-includes/js/tinymce folder

4) Download a refresh version of WordPress from WordPress.org and via ftp replace /wp-includes folder

I tried all above solutions but no success :(

I also refer following links but could not find solution

Wordpress Visual Editor broken

Visual editor not working in wordpress 3.8.1?

I have attached screen-shoot for visual editor tab and text editor tab for one page

Please help

Answer 1

I had this issue on APlus.net Hosting and had one heck of a time fixing it. All the text in the Visual Editor was white, and I couldn't get to the HTML tab. The Visual Editor was missing all the formatting buttons -- it was just a white empty space.

After trying everything listed across the web without success, I was finally able to track down the culprit on APlus hosting. It turns out APlus hosting injects their own analytics tracking code into even the WordPress Admin pages. The code for their analytics wasn't written properly -- the code was missing a final ending apostrophe, which resulted in breaking all the code that came after it. In my scenario, the injected code broke the Page Editor TinyMCE JS code.

I checked the Google Chrome inspector to find the error in the code, and after talking with a Tech Support rep at APlus I was able to fix it by deleting the analytics file on the server via FTP:

/private/.wmcnum

I hope this helps. If anything check out the Google Chrome inspector and look for errors. If it's something you can't change, definitely get in touch with your hosting provider.