loopback-component-passport error

Error: Can't set headers after they are sent.
    at ServerResponse.OutgoingMessage.setHeader (_http_outgoing.js:335:11)
    at ServerResponse.header (/Users/andi/xworkspace/woow/loopback-example-passport/node_modules/loopback/node_modules/express/lib/response.js:718:10)
    at ServerResponse.location (/Users/andi/xworkspace/woow/loopback-example-passport/node_modules/loopback/node_modules/express/lib/response.js:835:8)
    at ServerResponse.redirect (/Users/andi/xworkspace/woow/loopback-example-passport/node_modules/loopback/node_modules/express/lib/response.js:874:8)
    at complete (/Users/andi/xworkspace/woow/loopback-example-passport/node_modules/passport/lib/middleware/authenticate.js:241:26)
    at /Users/andi/xworkspace/woow/loopback-example-passport/node_modules/passport/lib/middleware/authenticate.js:250:15
    at pass (/Users/andi/xworkspace/woow/loopback-example-passport/node_modules/passport/lib/authenticator.js:427:14)
    at Authenticator.transformAuthInfo (/Users/andi/xworkspace/woow/loopback-example-passport/node_modules/passport/lib/authenticator.js:449:5)
    at /Users/andi/xworkspace/woow/loopback-example-passport/node_modules/passport/lib/middleware/authenticate.js:247:22
    at /Users/andi/xworkspace/woow/loopback-example-passport/node_modules/passport-google-oauth/node_modules/passport-oauth/node_modules/passport/lib/passport/http/request.js:4