It seems power-up is not working

[ddydeveloper]

I've created a new power-up according to the instruction, added the connector URL (https://trello.github.io/power-up-template/index.html), set all capabilities and saved changes:

Unfortunately, I see no changes in my team board:

Could you explain what is my configuration mistake?

[manishjaingit]

as per my understanding can we use power-up Trello by embedded in our own website?
I have also created the power-up team and not able to find any code documentation to embed it on our website just like bitbucket.

[GeorgeXCV]

Also having this issue, following the official tutorial and the expected button is not showing my Cards.