I'm sorry for the inconvenience, and I'll be happy to take a look.
Are you using the dashboard editor or the New Post button?
Which browser are you using? Can you try clearing your browser cache?
If you still get the same result, can you reply to this forum thread the exact error you're seeing when you click Publish?
Also, if you can take a screenshot that display the error and upload it to your Media Library, that would be super helpful.
Thanks!