Sorry to say that I found that was due to a serious internal network problem, the .js/.css files was server damaged and so the editor was not serverd the right way to the browser.
Fixing communication problems also fixed this issue. No changes to the code.
Related Posts:
- how to set default value for checkbox in wordpress
- Visual editor issue by having multiple tiny mce editors in a CPT
- How to consume external API from WordPress post editor and display the response data in the custom field?
- Help Creating a Slideshow Custom Post Type with Custom Meta Boxes?
- Custom Post Type – Taxonomy Dropdown Menu?
- How can I add a column/s to wp_posts table?
- echo value from ‘select’ field type into page template using cmb2?
- How to add multiple images to custom post type?
- wordpress plugin error handling
- How to get custom metabox image field?
- Detect meta value changes when post is updated (post_updated)
- Custom field being erased after autosave
- Order custom posts by a date metabox
- How to select one major category (or custom taxonomy) for a custom post type?
- How to sort CPT by custom meta value (date), and return posts month by month
- WordPress metabox file upload in custom post [duplicate]
- Use Custom Post Type as Custom Field
- Saving multiple Metabox contents
- Using ‘strtotime’ function to convert a custom-meta-box to a date-stamp
- Metabox saving values
- add_meta_box: Datepicker like the one for postdate?
- WP Query group/order by category name
- Save or update data when custom post published
- Displaying Meta Box Image
- Using posts and postmeta table to store custom Address Book Plugin data
- Multiple information using custom post type
- How to: add option to add more checkboxes on custom post type
- How to add multiple featured image in meta box in post editor?
- Formatting custom meta box date from YYYY/MM/DD to a more readable alternative
- Display custom post on home page based on a metabox selection
- Adding Meta Boxes while Registering a Post Type in a Class
- How to have the right design for a custom post type without accessing themes
- handling csv data with a custom post type
- Customize permalink when creating a post
- Custom Post Type Navigation on Custom Field
- Why do I lose the content of meta boxes when I leave the page?
- Dynamically add / duplicate custom meta in custom post types
- Add TinyMCE to CPT metaboxes in 3.1?
- WordPress custom meta field for custom post not storing data
- How to Duplicate (multiple meta box)?
- window.send_to_editor and jQuery .attr() conflicts with multiple custom upload image meta boxes
- List of Posts in a Custom Field
- Save an array from drop-down in custom meta box
- Populate Custom Fields in a Custom Post Type?
- Adding dropdown select meta box to custom post type – seems restAPI is interfering
- Keep display metadata value on backend – Custom Metabox
- How to check if user meta field is empty in conditional else statement
- Why is my select meta data not saving?
- dynamically add a custom field or metabox to custom post type [duplicate]
- Give a permalink to Custom Post Types without title
- Found 2 elements with non-unique id (#_ajax_nonce) and (#_wpnonce)
- Orderby CPT custom fields not working
- A better way to add a meta box to custom post types
- Plugin – Combine Meta Box Input Fields into single saveble record
- Meta Query Filtering not working on Custom Meta Box using Radio Buttons
- Show image gallery from a custom field
- Grouping metadatas into one
- Repeatable Fields Metabox with Textarea (or wp_editor)
- How to Create a WordPress Plugin With Custom Post Type/Custom Field Features?
- Cannot save CPT meta box
- Adding Page Templates to post but it ignored it
- Adding a metabox on a CPT’s submenu page
- custom comments form for custom post type
- Permalinks: custom structure for taxonomy – tags?
- Wrap meta boxes & data handling for specific post types in classes?
- Custom fields for custom post type
- Custom “radio button meta box” not saving correctly
- Add additional field to custom post_type
- Custom Post Meta from custom metaboxes is randomly being deleted
- Add a custom meta box for client to order CPT posts how they want
- Custom post type’s extra fields – how to handle?
- Save Multiple Metabox values
- Send a conditional email notification when a custom field value changes in Post Type
- Display Repeatable Meta Box Content
- create custom meta box with default value
- ACF in wordpress
- What do the numbers mean at the end of add_action(‘save_post’)…?
- A meta box (in a custom post type) with two different type of fields
- How to insert data into meta box from another plugin?
- Run query on specific admin options page and send results to select field in another function
- How save custom meta type posts multicheck grouped by taxonomy (with CMB2) [closed]
- Custom post type that lets users create a set of posts?
- php output of generated custom metabox
- check_admin_referer not working in custom meta box for custom post type
- Custom meta box in editor of custom post type not working
- Error in WP Query. If variable is empty it is displaying previous post value
- Avoid another meta box in my custom post type
- Delete custom post type metadata without deleting the post in admin area
- Search form to find custom meta box generated data
- Not Able to Display Metabox Saved Checkbox and Selected option After Save/ Update
- Filter CPT based on meta box value using Flexible Posts widget?
- Multiple Block Quotes without using HTML
- Textarea type on one field custom add_meta_box?
- WP_Query arguments: Loop through custom post type – get all entries except excluded meta_key?
- loop through custom post-type with two meta_keys
- Extending a CPT by Created by another plugin
- Custom meta box includes
- Creating entries with image attachements within posts and managing them in a list
- Custom Post Type + Custom Meta Query Not Showing 2012 Posts
- Adding a custom “Add Custom Field” button to Custom Meta boxes