How can i run the label studio fronted part

Hi,
I cannot run the label studio fronted part(version 1.13.1), I just get the web code from github and run the command yarn lsf:serve, but it saidLabelStudio is not defined. I don’t know how to run the code in the node environment. Also I need a Chinese version for the front page, if there is language package can I use?

Thank you for help.