fail2ban help maybe?

==> ./fail2ban.log <==                                                                                                                                               
2016-04-25 18:35:30,167 fail2ban.actions: WARNING [wordpress] Ban 192.0.102.45                                                                                       
2016-04-25 18:35:30,182 fail2ban.actions.action: ERROR  iptables -n -L INPUT | grep -q 'fail2ban-default[ \t]' returned 100                                          
2016-04-25 18:35:30,183 fail2ban.actions.action: ERROR  Invariant check failed. Trying to restore a sane environment                                                 
2016-04-25 18:35:30,193 fail2ban.actions.action: ERROR  iptables -D INPUT -p tcp -m multiport --dports ssh -j fail2ban-default                                       
iptables -F fail2ban-default                                                                                                                                         
iptables -X fail2ban-default returned 300                                                                                                                            
2016-04-25 18:35:30,203 fail2ban.actions.action: ERROR  iptables -N fail2ban-default                                                                                 
iptables -A fail2ban-default -j RETURN                                                                                                                               
iptables -I INPUT -p tcp -m multiport --dports ssh -j fail2ban-default returned 300                                                                                  
2016-04-25 18:35:30,207 fail2ban.actions.action: ERROR  iptables -n -L INPUT | grep -q 'fail2ban-default[ \t]' returned 100                                          
2016-04-25 18:35:30,208 fail2ban.actions.action: CRITICAL Unable to restore environment   

any ideas why im getting this error guys? any help would be greatly appriciated.