Fail to import PKCS12 to BigIQ using REST: key store mac invalid - wrong password or corrupted file.

I am trying to import a PKCS12 certificate to BigIQ.

I am able to upload the certificate correctly, but when I try to import it, it fails to read it:

Add certificate failed: Unable to retrieve PKCS#12 key information: Unable parse PKCS#12 file /var/config/rest/downloads/my_cert.pfx PKCS12 key store mac invalid - wrong password or corrupted file.

The steps I am doing:
1. Upload the pkcs12 cert to /mgmt/shared/file-transfer/uploads/my_cert.pfx

DEBUG:root:{'remainingByteCount': 0, 'totalByteCount': 5829, 'localFilePath': '/var/config/rest/downloads/my_cert.pfx', 'temporaryFilePath': '/var/config/rest/downloads/tmp/my_cert.pfx', 'generation': 0, 'lastUpdateMicros': 1689675638105998}

2. Add the certificate using ADD_PKCS12 (simplified version):

    url = f"https://{server}/mgmt/cm/adc-core/tasks/certificate-management"
    body = {
        "filePath": "/var/config/rest/downloads/my_cert.pfx",
        "itemName": "my_cert.pfx_TEST_NEW",
        "itemPartition": "Common",
        "command": "ADD_PKCS12",
        "keyPassphrase": "MyKeyPassPhrase",
        "securityType": "normal",
    }
    headers = {"X-F5-Auth-Token": token_id}
    response = requests.post(url=url, headers=headers, json=body)

 But I always get the same error, with or without keyPassphrase or securityType:

{
  "id": "...",
  "kind": "cm:adc-core:tasks:certificate-management:certmgmttaskstate",
  "status": "FAILED",
  "command": "ADD_KEY",
  "filePath": "/var/config/rest/downloads/my_cert.pfx",
  "itemName": "my_cert.pfx_TEST_NEW",
  "progress": "Parsing PKCS#12 key file information",
  "selfLink": "https://localhost/mgmt/cm/adc-core/tasks/certificate-management/...",
  "username": "...",
  "generation": 3,
  "endDateTime": "2023-07-17T08:56:57.876-0700",
  "errorMessage": "Unable to retrieve PKCS#12 key information: Unable parse PKCS#12 file /var/config/rest/downloads/my_cert.pfx PKCS12 key store mac invalid - wrong password or corrupted file.",
  "thirdPartyCa": {},
  "itemPartition": "Common",
  "startDateTime": "2023-07-17T08:56:57.791-0700",
  "userReference": {
    "link": "https://localhost/mgmt/cm/system/authn/providers/tacplus/.../users/..."
  },
  "ownerMachineId": "...",
  "lastUpdateMicros": 1689609417925835,
  "identityReferences": [
    {
      "link": "https://localhost/mgmt/cm/system/authn/providers/tacplus/.../user-groups/..."
    },
    {
      "link": "https://localhost/mgmt/cm/system/authn/providers/tacplus/.../users/..."
    }
  ]
}

Can you please help me with this?

* Edit to add upload response.