Logic Apps Azure Datalake "Read File" fails with "BadGateway" but no place to specify

[BobWarren]

Describe the Bug with repro steps

Existing Azure Logic App for send Email. Added step to "Read File" from filename parameter from our Azure Datalake gen2 storage and attach. Every test gets "BadGateway" response. However, there is nowhere I can find to specify a gateway?

What type of Logic App Is this happening in?

Standard (Portal)

Which operating system are you using?

Windows

Did you refer to the TSG before filing this issue? https://aka.ms/lauxtsg

Yes

Workflow JSON

{
    "definition": {
        "$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
        "actions": {
            "Send_an_email_(V2)": {
                "type": "ApiConnection",
                "inputs": {
                    "host": {
                        "connection": {
                            "referenceName": "office365-1"
                        }
                    },
                    "method": "post",
                    "body": {
                        "To": "@triggerBody()?['recipients']",
                        "Subject": "@triggerBody()?['subject']",
                        "Body": "<table style=\"width:100%;\">\n        <tbody><tr>\n            <td style=\"width:150px;\">\n\n            </td>\n            <td style=\"padding-right:auto;\">\n                <p style=\"font-family:Arial,Helvetica,sans-serif;font-size:2.5rem;font-weight:bold;\">\n                    @{triggerBody()?['title']}\n                </p>\n            </td>\n        </tr>\n    </tbody></table>\n    <hr style=\"height:0.5rem;color:#FFB91D;\">\n@{triggerBody()?['body']}",
                        "Cc": "@triggerBody()?['cc']",
                        "Bcc": "@triggerBody()?['bcc']",
                        "Attachments": [
                            {
                                "Name": "@lastIndexOf(triggerBody()?['attachment'],'/')",
                                "ContentBytes": "@base64(body('Read_File'))"
                            }
                        ],
                        "ReplyTo": "@triggerBody()?['replyTo']",
                        "Importance": "Normal"
                    },
                    "path": "/v2/Mail"
                },
                "runAfter": {
                    "Read_File": [
                        "SUCCEEDED"
                    ]
                }
            },
            "Read_File": {
                "type": "ApiConnection",
                "inputs": {
                    "host": {
                        "connection": {
                            "referenceName": "azuredatalake"
                        }
                    },
                    "method": "get",
                    "path": "/webhdfs/v1/@{encodeURIComponent(triggerBody()?['attachment'])}",
                    "queries": {
                        "account": "NNN_ACCOUNT_NNN",
                        "op": "OPEN",
                        "read": "true"
                    }
                },
                "runAfter": {}
            }
        },
        "contentVersion": "1.0.0.0",
        "outputs": {},
        "triggers": {
            "When_a_HTTP_request_is_received": {
                "type": "Request",
                "kind": "Http",
                "inputs": {
                    "method": "POST",
                    "schema": {
                        "properties": {
                            "bcc": {
                                "required": false,
                                "type": "string"
                            },
                            "body": {
                                "required": true,
                                "type": "string"
                            },
                            "cc": {
                                "required": false,
                                "type": "string"
                            },
                            "recipients": {
                                "required": true,
                                "type": "string"
                            },
                            "replyTo": {
                                "default": "NNNNNN",
                                "required": false,
                                "type": "string"
                            },
                            "subject": {
                                "required": true,
                                "type": "string"
                            },
                            "title": {
                                "default": "Notification",
                                "required": false,
                                "type": "string"
                            },
                            "attachment": {
                                "required": true,
                                "type": "string"
                            }
                        },
                        "type": "object"
                    }
                }
            }
        }
    },
    "kind": "Stateful"
}

Screenshots or Videos

No response

Browser

Edge

Additional context

No response