Trello board iFrame does not load (denied).

Issue #15027 new
Mitesh Shah
created an issue

Error from Chrome Version 60.0.3112.101 (64-bit) on macOS:

Refused to display '' 
in a frame because it set 'X-Frame-Options' to 'deny'.

Error from Firefox Developer Edition 57.0b6 on macOS:

Load denied by X-Frame-Options: 
does not permit framing.

Trello account is free but has the Bitbucket cloud power-up enabled.