Hi.

My first suggestion is to check if you have written the password correctly, if you have the general option for auto capitalization activated, the first letter is a capital one and could be the cause of the error.
Also, the username is the complete user@gmail.com

With Blogger you need get the blogs you have and choose one, if not publish won't work.

If nothing of this works I will have to look more in depth that version. Actually I am going to publish the new one in the stable repository in the next days.