"This issue can't be scheduled because no one is available" - how to address the error ?
Upgrade and increase the capacity of the team (for example adding one or more new team member) don't eliminate the error.
The only way seams to change in Jira the "assegnee" to "unassigned" and then recalculate.
I expect another behavior: the release will not comply with the due date, but the issue must be scheduled and the team overbooked.
Way only for some of the issues rise the error above ?