I'm getting a 500 error when doing a POST to /transactions, similar to the issues described in this topic and this one. I already had ISO-formatted the date and wrapped my request in a transaction object.

I've tried POSTing each of the following transactions separately:

{
    "transaction": {
        "account_id": "<acct id>",
        "date": "2021-02-16",
        "amount": 116.91,
        "payee_id": "<payee id>",
        "payee_name": "Payee Name",
        "category_id": "<category id>",
        "memo": "Auto-generated from email dated 2021-01-27"
    }
}

{
    "transaction": {
        "account_id": null,
        "date": "2021-02-16",
        "amount": 0,
        "payee_id": null,
        "payee_name": null,
        "category_id": null,
        "memo": "TEST"
    }
}

What'd I miss?