EventSource's response has a MIME type ("text/event") that is not "text/event-stream". Aborting the connection.

[no5no6]

I did these things：

vue init webpack my-project
cd my-project
npm install
npm run dev

I've looked up a lot of informa about it, maybe webpack-hot-middleware wrong，I try and fix it, but, The problems remain unsolved.

[posva]

Please, open the issue on the relevant repo, this has nothing to deal with vue-cli.