We recently upgraded from Jira 8.13 LTS to 8.20 LTS (Datacenter) and I seem to not be able to create new Advanced Roadmap Live Plans.
Before the upgrade I would simply create a new plan and revert to the old live plan interface but that option seems to be missing now and Avanced Roadmaps was migrated from an installed plugin to a system component, so I can not downgrade to an older version.
Is there still a way to create new live plans (even through some hack or API) in Jira 8.20 Datacenter?
We are aware that live plans are depricated and will not exist in Jira 9 but our existing Live Plans are still working fine and the the new "improved" interface is still pretty unusable and lacks basic features (like per-person capacity planing, default size for issues, value role-downs..).