I have this problem too. I can’t even update a simple link.
Will have to dig into this today…
I looks like a theme related issue here with my installation. I use a child-theme for twentyfifteen.
Switching the theme restores functionality. But I don’t know why yet. I is definately an error with my child-theme here, since the error is not showing up in twentyfifteen.
Have a look into your functions.php and check if there is some line like this one:
add_filter( 'tiny_mce_plugins', 'disable_emojis_tinymce' );
It was in my init-hook instructions to disable emojis. Maybe this helps.
I think that there is a communication bug between the pre-installed Gutenberg-editor in wordpress and the Classic-editor plugin.
When Gutenberg was introduced it wasn’t integrated directly ind wordpress and there were several problems with it so the recomended solution was to uninstalle the Gutenbergeditor and install a new plugin with the classic editor.
Later the Gutenberg was properly integrated into wordpress and i think that it was ther my problems began.
A couple of days ago i was at the brinck of giving up and was sitting lokking through all my installed plugins – and decided that maybe i sholuld give the gutenberg editor a new try so without thinking i went to wordpress.org and installed this version of the Gutenbergeditor
https://da.wordpress.org/plugins/gutenberg/
without thinking that Gutenberg now actually is integrated in wordpress.
But before i went on to deactivate and uninstall the Classic-editor i just clicked on “Add new page” AND TO MY BIG SURPRISE
THE COMPLETE TOOLBAR SHOWED UP IN THE EDITOR 🙂 🙂
So I didn’t do anything more except a celebration dance (my wife gave me a weird look)
Now my complete list over installed editorplugin and extra looks like this:
https://da.wordpress.org/plugins/gutenberg/
Classic Editor – https://wordpress.org/plugins/classic-editor/
Classic Editor Addon – https://wordpress.org/plugins/classic-editor-addon/
TinyMCE Advanced – https://wordpress.org/plugins/tinymce-advanced/
WP edit – https://wordpress.org/plugins/wp-edit/
WP Super Edit – https://wordpress.org/plugins/wp-super-edit/
This unexpected solution worked for me – maybe it will work for you
(I’ll cross my fingers for you)
/Lars
I already solved my problem yesterday by deactivating that filter…
But you have an interesting combo of editor-plugins there. Didn’t know WP Edit.
I personally switch to Gutenberg now. Even if it feels still like beta in some areas.