I’ve had a similar problem since installation. To the best of my knowledge, we started with the newest version of WordPress; we only set up the website two weeks ago. Regardless, we’ll try the steps James suggests.
At any rate, I did have one piece of information that might pinpoint the fix. The problem ONLY occurs when I try to post a link. It happens whenever I try to post a link, whether I use the ‘link’ button or just type in something like https://www.robertcroman.com or [email protected].
Please, I’d appreciate any feedback as to what type of server-side script might be causing the error. That way I can take that information to my hosting provider, rather than just going to them with an ambiguous complaint about security scripts.
Thanks terribly much for your time,
Bob