Uploading CSV file in Rest Assured returns 500

I've been struggling to upload my CSV file via Rest Assured. It returns 500, while it works fine on Postman.

File myFile = new File("src\test\resources\myfile.csv");

    response = given()
            .spec(requestSpecification).config(RestAssured.config().encoderConfig(EncoderConfig.encoderConfig().appendDefaultContentCharsetToContentTypeIfUndefined(false)))
            .multiPart("file", myFile,"multipart/form-data")
            .when()
            .post(endpoint)
            .then().extract().response();

I also tried

• without: encoderConfig & appendDefaultContentCharsetToContentTypeIfUndefined

• with:

        .body(file)
        .contentType("text/csv")
  

also,

.config(RestAssured.config().encoderConfig(EncoderConfig.encoderConfig().encodeContentTypeAs("multipart/form-data", ContentType.MULTIPART)))
                .contentType("multipart/form-data; boundary=--MyBoundary")

I think I've tried everything I found on the internet, but it still returns 500.

On Postman it works fine I focused mainly of multipart/contentType part, but maybe the issue lies somewhere else?

Do you have any others ideas? I'd be very grateful

EDIT: POSTMAN console

If you choose this method multiPart(String controlName, File file, String mimeType) to upload, then the last parameter is mimeType "text/csv"

.multiPart("file", myFile, "text/csv");

full code:

File myFile = new File("src\\test\\resources\\myfile.csv");

response = given()
    .spec(requestSpecification)
    .multiPart("file", myFile, "text/csv")
    .when()
    .post(endpoint)
    .then().extract().response();