I'm creating a very simple Power-Up which should add a button to the board.
I followed the Power-Up tutorial on Trello and created the necessary files over https and added the Power-Up in the admin section.
When I go to any board and try to activate the Power-Up, I can see it in the list, but with an error message "Unable to load Power-Up"
My question is : "is there any way to debug this ?"
Otherwise could anyone have a look to my files and tell me if something looks wrong ?
Thanks in advance for your help
Looks like your server doesn't set the Access-Control-Allow-Origin header. See https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS
You need to add the header to allow trello.com to load your powerup from an scripting request.
I added the header but this still does not work.
I've imported the Trello Power-up template code on my server and it still does not work, which shows that the server is the issue.
Specially seeing that if I import the same manijest.json file from github it works fine.
I've checked both servers HTTP headers but I don't manage to find where this could come from.
Do you have any idea ?
Status: HTTP/1.1 200 OK
Date: Sat, 22 Jul 2017 09:46:51 GMT
Last-Modified: Sat, 22 Jul 2017 09:38:29 GMT
Content-Type: application/json; charset=utf-8
Strict-Transport-Security: max-age=16000000; includeSubDomains; preload
If you had to thrive a new habit during a lockdown, what would it be? Trello
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events