One of my friends was having an issue when he made a post on wordpress he was unable to preview it. This is general troubleshooting
How we ruled it out
- Checked the htaccess file
- Cleared the browser cookies
- Checked the mysql database
- Then deactivated all plugins (which made it work)
What we did next
- Activate then test preview button few dozen times.
- It was a plugin with woocommerce but it could have been any plugin
