Reference
TASK_SUBJECT_NOT_FOUND
The record the task is about does not exist
The record the task is about does not exist
HTTP status 404 Not Found, code TASK_SUBJECT_NOT_FOUND.
What it means#
No record with that id exists in your organisation, or it was deleted, or it belongs to an account whose tasks you do not work.
What to do#
Check the id of the record the task is about.
On the wire#
Every error response carrying this code names this page in error.moreInfo,
with the request id in the query string. See Error codes for
the response shape and the list of every code.