Error while saving an attachment in servicenow table using REST and SAVE AN ATTACHMENT

[mdshahvez11]

{
    "Action Status": {
        "code": 1,
        "message": "Error encountered while creating Attachment. Record for file Changes on letters ALL.xlsx is not of required class."
    }
}

I'm getting attachments in href or in url and i'm using SAVE AS ATTACHMEMNTS way to save them with there respective record , but while runnig the flow i'm getting this error. 

[Shivalika]

Hello, Could you please share how you solved it ? 
I am also facing same issue in save as attachment. I have specified header as "*/" and also as application or octet stream. Security also I have altered to download the required extension attachments. Also I have uploaded the attachment manually and verified, its uploading. But this automation step is failing with same error repeatedly.