Planner - Failed to create plan
When I try to create a Planner tab I keep getting the message "Failed to create plan"
This seems like a bug. As mentioned, you can remove and add the owner, it works, or you can add the owner to the members group. Adding the planner tab seems to look only at the members group. A workaround could be if the new team process added the Temas owner to the members group, or ideally permissions would let an owner do this (which makes the most sense). This causes our support team a lot of work and also causes delays for users.
This seems to be a problem where planner is looking at members only and not owners. To add planner requires adding the Teams owners to the Teams Members group.
ANNE KELLEY commented
Same here -- this just started happening -- what changed? We use a template when provisioning our team sites and this was working just fine.
Issue happens from time to time. You can solve it with this workaround:
remove member/owner from Team and add him/her again. Now it works perfectly.
This has been happening since last week for us..
Same issue for me.