Hello everybody!

Some time ago (about a month ago)

My tool worked fine, uploading files to monday via the API

Now I’m getting an error:

{"errors":"{"message":"'content-type' header must be one of: \\\\"application/json\\\\" or \\\\"application/graphql-response+json\\\\"","extensions":{"code":"INVALID_CONTENT_TYPE_HEADER"}}],"account_id":null}

I use multiloading of files by sending a request for each file in turn.

my TS(javascript) code

for (const file of files) {

        const formData = new FormData()

        formData.append(

            'query',

            `

            mutation($file: File!) {

            add_file_to_column(

                file: $file,

                item_id: ${id}

                column_id: "${columnId}",

            ) {

                id

            }

            }

        `

        )

        formData.append('variablesefile]', file)





            const response = await fetch(API_URL, {

                method: 'POST',

                headers: {

                    Authorization: API_KEY,

                    'API-Version': API_VERSION

                },

                body: formData

            })

}

Does anyone know how to solve this error since I can’t send files to application/json?