Error with 'Upload File' field from MS Form to SP list

 Check the below steps and let me know if this works for you.

1)Start by setting up a trigger for your Microsoft Form using "When a new response is submitted".

2)Retrieve the details of the form response using the "Get response details" action. This action helps to retrieve the individual answers submitted by the respondent.

triggerOutputs()?['body/resourceData/responseId']

3) Add action, "Initialize variable" and create variables with array type and store the upload type questions in the value.

4) Then loop the questions to get a attachments and Include action, "Parse Json" to extract the link from Json 

items('Apply_to_each_2')

outputs('Each_Question_Files')

You can use the below schema to parse json.

{

    "type": "array",

    "items": {

        "type": "object",

        "properties": {

            "name": {

                "type": "string"

            },

            "link": {

                "type": "string"

            },

            "id": {

                "type": "string"

            },

            "type": {},

            "size": {

                "type": "integer"

            },

            "referenceId": {

                "type": "string"

            },

            "driveId": {

                "type": "string"

            },

            "status": {

                "type": "integer"

            },

            "uploadSessionUrl": {}

        },

        "required": [

            "name",

            "link",

            "id",

            "type",

            "size",

            "referenceId",

            "driveId",

            "status",

            "uploadSessionUrl"

        ]

    }

} 

5) As a final step, add action "Create Item" in SharePoint to create the item. Use the expression,

first(body('Parse_JSON_2'))?['link'] to upload the link in the hyperlink column.

helpmepl5