What happened
PUT /v1/organizations/{orgId}/billing/subscription (change-plan) was rejected because the organization’s cancellation has already taken effect — there is no active Orb subscription to modify. (For canceled-but-not-yet-effective state, see cancellation_revertable.)
How to fix
Sign up again withPOST /v1/organizations/{orgId}/billing/subscription. A new Orb subscription is created on the same Orb customer using the plan ID supplied in the request body; previously-granted signup credit is preserved so it is not granted twice.