Hello Doctor Hart,
This is a fairly common problem with older browsers or browsers with high security settings.
The solution is easy: either clear your browser’s cache and re-login or upgrade to a newer browser like Chrome/Firefox.
What’s happening is you’re taking too long to write the article and the browser (internet explorer?) is deleting your cookies — which causes all kinds of problems and prevents you from posting your article. Once you’re cleared your cache and re-logged in, it shouldn’t be an issue.
I recommend writing your articles in a word document and then pasting them into the blog article. Just make sure you hit the “paste as plain text” button first!
Best Regards,
-Roderick