Easy Blog no longer notifying subscribers when new post is created

Easy Blog is no longer notifying subscribers when new post is created, nor is it notifying me that a new post has been created on my site. This was first apparent to me July 18 when I put up my last post, prior to that everything was working as it should have been. I have not altered any settings to my knowledge as all was working.

I'm also unable to update to 5.2.7 - getting a http 500 error repeatedly - currently installed version 5.2.4, don't know if this might be where any problem lies.