Duedate not available?

we have an on-premise jira server and i try to create an issue with a duedate, unfortunately i get an error. my request is this:

{
  "fields": {
    "issuetype": {
      "id": "10603"
    },
    "project": {
      "id": "11500"
    },
    "reporter": {
      "name": "oliver.xxx"
    },
    "components": [
      {
        "name": "Aktives Verzeichnis"
      }
    ],
    "duedate": "2022-12-01",
    "assignee": {
      "name": "oliver.xxx"
    },
    "summary": "asdf",
    "description": "Betroffener Server: xxx\nDatum: 2022.12.01 \nasdf"
  }
}

the response i get is this
{"errorMessages":[],"errors":{"duedate":"Field 'duedate' cannot be set. It is not on the appropriate screen, or unknown."}}

so i checked the documentation, it states that i could check which fields are available with createmeta, but when i GET that (/rest/api/2/issue/createmeta) i get:

{
"errorMessages": [
"DER VORGANG EXISTIERT NICHT."
],
"errors": {}
}

which means probably, that project does not exist. I am wondering if this is a configuration error that i can not query that URI and if its also a configuration error with that duedate field?

was able to find the fields at /rest/api/2/issue/createmeta/10800/issuetypes/10800 and there is a duedate

{
"required": false,
"schema": {
"type": "date",
"system": "duedate"
},
"name": "Fälligkeitsdatum",
"fieldId": "duedate",
"hasDefaultValue": false,
"operations": [
"set"
]
},

that looks ok to me, so could this be a permission problem or so?

The duedate field needs to be on edit screen for the issuetype and the user needs to have the schedule issue permission via roles and permissions.