The issues, commiter etc. for this module look odd (mysteriously old)... am hoping that someone will pick this up. Happy to help if I can, but would be good to know I am not posting in a vacuum ;)
Installed using latest version of Drupal 8.0-dev installed apparently without error but no blog content type, view user profile resulted in a page title Error.
Had error entries in log as follows:
Recoverable fatal error: Object of class Drupal\Core\Entity\Field\Field could not be converted to string in blog_user_view() (line 30 of /srv/drupal8/modules/blog/blog.module).
Edit: url blog/
results in the error:
Fatal error: Class 'PagerDefault' not found in /srv/drupal8/core/lib/Drupal/Core/Database/Query/Select.php on line 300