Visual Editor and toolbar gone

Things that usually can fix this problem:

-Disable Browser plugins like Adblock and similar.
-Increase memory limit in wp-config: review this codex for some guidance for increasing memory available for PHP.
-Ask your Web Host to increase memory limit directly in the PHP settings.
-Try Troubleshooting with your browser: Your browser can help you identify JavaScript issues or conflicts and this article can assist you in doing that diagnosis. This could help identify Visual Editor issues as well.
-Try manually resetting your plugins. If that resolves the issue, reactivate each one individually until you find the cause. Also remember to deactivate any plugins in the mu-plugins folder (if you have created such folder). The easiest way is to rename that folder to mu-plugins-old.

Good thing is that you already ruled out a theme issue.
About the plugins, well sometimes you have to completely remove them to be sure they’re not interfering.

Anyway, one of those alternatives should make it.

Hi,
This can be caused by these

This WP error is common and you see it when your browser gathers cache
If there is any installation issue
This issue may be due to use of many plugins (conflicting plugin) as these Plugins starts interfering JS files.
This may be due to lack of TinyMCE plugin in your theme

I found good solution here Please check this article
White text or missing buttons in the visual editor

This article does have some points which you have not tried yet.

Please help me to solve this error on my WordPress Editor.
Whatever I’m writing its showing white text and also visual component is not loading while I’m going to add new post or editing existing post on my site patty360.com
It’s showing like this,
https://prnt.sc/laqu38

I updated two days ago to the latest Centos 7.6 release on my server on which and I run a WordPress 4.9.8 based website (recently installed).
Before the CentOS update, the visual editor in WordPress worked just fine. No problems at all with WordPress.

Today, the editor now only shows “white text” and the buttons in the editor are gone.
This is a “well-known” issue in WordPress, and I checked all reported remedies for this : https://www.newtonbaba.com/white-text-and-missing-buttons-in-wordpress-visual-editor/
I tried all, and none of them fixed the problem.
As the problem showed up after the CentOS update, and I cannot not find any other reason for the issue on the web, this makes me think the issue is related to the CentOS upgrade.

Does anyone have any similar problems and what did you do to mitigate this annoying flaw?
For now, I copy the “white text” into another seperate editor, do my changes, and copy the text back into to wordpress editor, but it’s not optimal…

Thanks for any hint!

Ralf

SOLVED !!

The key was the apache httpd.conf file.
I had included a couple of directory access limitations (recommended by several WordPress users), among which the wp-includes directory:

<DirectoryMatch ^.*/wp-includes/>
<Files *.php>
Deny from all
</Files>
</DirectoryMatch>

This ALSO prevented me from accessing the wp-tinymce.php file which controls the visual editor and which is in that directory….
So I added an exception for this file. The whole section in the httpd.conf reads now:

<DirectoryMatch ^.*/wp-includes/>
<Files *.php>
Deny from all
</Files>
<Files wp-tinymce.php>
Order allow,deny
Allow from all
Satisfy any
</Files>
</DirectoryMatch>

This solved the problem with the WordPress visual editor!

SOLUTION in my case:

An editor for a client was working properly. They wanted to get their website faster, so I tried out different speed optimization plugins. One of these plugins added into the functions.php file this line:

add_filter( ‘tiny_mce_plugins’, ‘disable_emojis_tinymce’ );

This somehow broke the visual and text editor, and also some buttons in the bar were missing. When I saved a content it was not stored. So I deleted this line saved the file and then the editor toolbar was working again properly.

Hope this helps you guys.