Can not login elastic web interface

I can not login elastic web interface at localhose:5601. Not matter what I put in username and password, it shows “we couldn’t log you in, please try again”

I do have user “elastic” and password correct, but can not log in.

Any idea how should I do there to log in web interface?

You need to look at the Kibana logs. And if you don't understand them, share them here.