‘parsererror’ error In MYSQL Axaj Django upload in chunks

I want to upload a file in chunks, and it works on SQLite but i wont work with MYSQL, and it uploads the file only till 10mb/11mb. Debug false/true gives me the same error

JS:

    $.ajax({
        xhr: function () {
            var xhr = new XMLHttpRequest();
            xhr.upload.addEventListener('progress', function (e) {
                if (e.lengthComputable) {
                    if (self.file.size < self.max_length) {
                        var percent = Math.round((e.loaded / e.total) * 100);
                    } else {
                        var percent = Math.round((uploadedChunk / self.file.size) * 100);
                    }
                    $('.progress-bar').css('width', percent + '%')
                    $('.progress-bar').text(percent + '%')
                }
            });
            return xhr;
        },

        url: '/create-post',
        type: 'POST',
        dataType: 'json',
        cache: false,
        processData: false,
        contentType: false,
        data: formData,
        error: function (xhr) {
            alert(xhr.statusText);
        },
        success: function (res) {
            if (nextChunk < self.file.size) {
                // upload file in chunks
                existingPath = res.existingPath
                self.upload_file(nextChunk, existingPath);
            } else {
                // upload complete
                $('.textbox').text(res.data);
                alert(res.data)
            }
        }
    });
}};

Views:

https://imgur.com/a/FThSXAO

All of this gives me

parsererror

Nothing else…