Just to be clear, node-red-dashboard is the framework for the dashboard. In order to see things (like charts and gauges etc) you have to add them to your flow and send some data to them. Do you have ui nodes installed and being fed data?
Also, please export your flow and attach it to a reply.
In order to make code readable and usable it is necessary to surround your code with three backticks (also known as a left quote or backquote ```)
```
code goes here
```
You can edit and correct your post by clicking the pencil 
icon.
See this post for more details - How to share code or flow json
