webpack-dev-server start error because can't find moudle 37

Question

when I tried to start a server with webpack-dev-server, an error has occurred。

so I go to index.ts,and look line32. It is just a 'import'

I debug when the error happen again

when I print on Devtool, I found it's because 'I[g]' didn't exist. so how can i find the lost module and resolve this problem?

ps：when I start a server with Nginx after build, it can work right.