Can't access Bitbucket repositories with Cloud Build

In my company we use Bitbucket for Git and want to use Cloud Build to improve our building pipeline. When setting up a new project for Cloud Build, we get to the point where the two are connected. We authorize ourselves via OAuth, and everything seems to work fine.

But then we reach the point when we have to select a repository from a list to be able to setup building configurations. The list is totally empty and we cannot finish setting up the connection between the Unity Cloud Build Project, and the respective Bitbucket repository.

Since we have one company account with all permissions, and we're restricted to our specific roles, this might be a permission issue. Our roles of 'managers', however, should give us enough privileges to access the company account's repositories, though, right? The Repositories are owned by a similar account over at Bitbucket. Might this cause some problems?

I hope I gave you sufficient information. Any help will be appreciated!