FortiClient VPN not connecting on Ubuntu: Backup routing table failed

solution_is_here 

I think I may have solved this.  The metric for my wired connection ("connect automatically with priority") was set to -999.  I have never touched that setting, AFAIK.  Hovering over the value, the help popup said the default value is 0.  Changed it to 0, and FortiClientVPN now fully connects, without the backup routing table error.