Frappe dashboard and demo data not loading

I have installed frappe insights 0.8.1 version in my already created site.Now when I go to open insights from awesome bar neither default dashboard of e-commerce is showing neither demo data is loading.
For dashboard :

Insights Query QRY-0003, 0004,0005 and so on not found.
for demo data:

Internal Server Error

Hey, this happens only when there’s some error while importing demo data. I need to look into this and fix it. It’s not a priority.

If you want to get demo data, you will have to create a new site or re-install the existing one of possible.

If you are just looking to test out Insights, you can get a test instance running in minutes using this link - Frappe Insights