We recently got a client support request for a fix regarding an issue they were constantly experiencing while trying to edit or publish a post on their WordPress news site. It seems that now and then, the Author was locked out of the post and had to re-login to continue editing the post. Every time the Author experienced this glitch, one of the following warnings was displayed on his post-edit page. "Updating failed. The response is not a valid JSON response." or "Updating failed" After creating a staging site, we tried and finally managed to experience the issue ourselves. The first thing we did to troubleshoot the issue was … [Read more...] about How to Fix the WP API Returning Invalid User Id Issue