Can anyone tell me what has happened to basic grey challenges

I have just clicked onto basic grey blog challenge to see what challenge was set yesterday and got this message below

This blog is open to invited readers only

http://basicgreychallenges.blogspot.com/

It doesn't look like you have been invited to read this blog. If you think this is a mistake, you might want to contact the blog author and request an invitation.

Has anyone else got that, or can someone tell me how to contact the blog author as I cannot get on the blog to see, thanks Julie