.wpcf7-response-output, .wpcf7-not-valid-tip {
    display: none !important;
}
.wpcf7-form-control-wrap[data-name="upload01-zl-mfcf7-upld-btn"] .wpcf7-not-valid-tip {
    display: block!important;
}
#mfcf7_zl_add_file {
    display: none;
}