No successful results with node.js agent on linux

Hi Patrick
I setup the private instance and node.js agent(webpagetest 2.19) on linux. The node.js version is v6.10.2 and npm version is 3.10.10.
But after i run the tests it always get the blank results.
Please check the attached snapshot and debug log.
Would you like help me about it?
Thank you!

Is there anyone help me?:huh: