How can I grant Bitrise access to a Bitbucket team?

This guide explains how to grant access for bitrise.io to your Bitbucket team.

Open Bitbucket.
Go to your Bitbucket Team’s page. The simplest way to do so is simply enter https://bitbucket.org/<team_id> in the address bar of your browser.
On the left, select Settings.
Find and click OAuth.
Check if you denied access to Bitrise.
If yes, click Remove. This will remove the denial.

If you have a project with one or more submodules or other private repository dependencies (for example, CocoaPods repositories), you have to grant access to all repositories for a successful...

This guide explains how to grant access for bitrise.io to your GitHub Organization. This way Bitrise can access the Organization's repositories.

If you want to do manual SSH key configuration on bitrise.io, you can generate an appropriate SSH keypair with a simple Command Line / Terminal command.

You probably did not grant access to bitrise.io when you authenticated with GitHub to access the organization (or a repository owned by the organization).