Fix bug in signup where an error is never delivered to browser
Fix bug in signup where an error is never delivered to browser

pengjiang80/ui,rancher/ui,vincent99/ui,vincent99/ui,pengjiang80/ui,lvuch/ui,rancher/ui,rancherio/ui,rancherio/ui,rancher/ui,pengjiang80/ui,lvuch/ui,westlywright/ui,rancherio/ui,westlywright/ui,westlywright/ui,vincent99/ui,lvuch/ui