fail2ban error
 

Anyone know why it fail to start?
View Screenshot

Please post relevant information, not just a vague question with a screen shot. What version/distro of Linux? How did you install fail2ban? How did you set it up? What have you done/tried??

If you Googled this (linux fail2ban 401), the first link:
http://articles.slicehost.com/2009/7/29/fail2ban

Has a tutorial on setup, and specifically addresses the 401 error. If this doesn't work, please come back and post some actual details, and we can try to help.