500 Error on "Follow Tag"

API endpoint: /answer/api/v1/follow

Payload:

{
  "object_id":"428",
  "is_cancel":false
}

Response:

{
    "code": 500,
    "reason": "base.database_error",
    "msg": "Data server error.",
    "data": {
        "err_type": "toast"
    }
}

Any ideas what could be goosed?