I have installed Bamboo (6.3.1 build 60306) on an Ubuntu 16.04 instance.
I'm attempting to add a Linked Repository to connect to my BitBucket cloud instance.
In order to do that I've added the "Shared Credentials" of type SSH.
Now, when I attempt to add a new "Linked Repository" and choose the option "Use shared credentials to authenticate" I get the following error message:
"No shared credentials of this type have been defined. You can configure them in administration panel on Shared credentials page.
More information about shared credentials can be found in the documentation."

I've tried adding a "Shared Credentials" of type "Username & Password", which shows up when I attempt to add a new "Linked Repository". However, when I click on "Load Repositories", I get the error message "Failed to load data from Bitbucket. [403 Forbidden]"
