Looks like I'm not the first one having problems with this API: https://jira.atlassian.com/browse/BAM-18666
since this API is broken I have no use for it, so the question can be closed.
For now in order to get child plans I'm parsing HTML Page, it works fine.
G’day Community! As we gear up to introduce Bamboo Data Center to the world, we wanted to make sure that we shared a bit more about Bamboo, the product. Our team has put together an overview video ...
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