Hello,
I receive 404 error if I have enable the easy blog tap and the user belong to group that cannot create blog post.
For example I turn off the setting "Allowed To Write New Post" for register users in easy blog ACL options.
If a register user try to visit the profile page see 404 error page with message "Invalid author id provided."
If easy blog tab plugin is unpublished or have access lever for group with write permission works.
Thanks