Error 401 : undefined what do i do?

I’m very new to dreamfactory, and I was justadding a REST API to a db service, now, when I wanted to access my API docs, I get this unknown error 401 : undefined What do I do about it? Do help me

If you are trying to access API Docs in the browser you should be using and you will need to be logged in.

If you are using an application (for example the using the javascript SDK), which tells you to set your $dsp_url to https://your_dsp_hostname_here/rest/api_docs, you need to make sure you using a valid session.