Not able to login on development machine

I have install bench, Frappe 7 on development machine.
When I try to login there is no error on server side, but on console I found following error.

jquery.min.js:4 POST http://localhost:9090/ 404 (NOT FOUND)l.cors.b.crossDomain.send @ jquery.min.js:4n.extend.ajax @ jquery.min.js:4$ @ @ (index):493(anonymous function) @ (index):421n.event.dispatch @ jquery.min.js:3r.handle @ jquery.min.js:3
VM141:1 Uncaught SyntaxError: Unexpected token <

Tested again:

This issue comes when we do bench serve I can not login, but when I do bench start I am able to login.