Should the below work, we get a 400, so typically means invalid or missing required data? We have checked the ids and all seem correct.
PUT /projects/1/tasks/reorder
Payload:
{
"task_ids": [
3,
2,
1
],
"task_list_id": 1
}
https://developers.activecollab.com/api-documentation/v1/projects/elements/tasks/reorder.html