Как исправить ошибку «DOM Exception 18» gulp-uncss?

Question

[Адель Халитов]

gulp.task('build', function() {

	var delDistr = del.sync('dist/');

	var buildHeaderCss = gulp.src('app/css/header.min.css')
		.pipe(uncss({
			html: ['app/index.html']
		}))
		.pipe(gulp.dest('dist/css/'))

});

body {
  font-family: "Open Sans", sans-serif;
  color: #666;
  height: 100vh; }

.cust-flex {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  height: 100%; }

.cust-mh {
  min-height: 15rem; }

.cust-filter {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0; }

.title-block {
  font-family: "Kurale", serif;
  font-size: 2.5rem;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 5rem;
  word-wrap: break-word; }

.firm-color, i {
  color: #4f8cff; }

.btn-cust {
  background-color: #4f8cff;
  border: 0.1rem solid #2d6add;
  color: #fff; }
  .btn-cust:hover {
    background-color: #71aeff;
    color: #fff;
    cursor: pointer; }

section {
  padding: 5rem 0; }

.firm-font {
  font-family: "Kurale", serif; }

header {
  position: relative;
  background: url(/img/bg.jpg) no-repeat 50% 50%;
  background-size: cover; }
  header .filt1 {
    background-color: rgba(0, 0, 0, 0.5); }
  header h1 {
    font-size: 5rem; }

/* Our product */
.our-product p {
  font-size: 1.25rem; }

/*==========  Desktop First Method  ========== */
/* Large Devices, Wide Screens */
@media only screen and (max-width: 1200px) {
  /* */ }

/* Medium Devices, Desktops */
@media only screen and (max-width: 992px) {
  header h1 {
    font-size: 4rem; } }

/* Small Devices, Tablets */
@media only screen and (max-width: 768px) {
  .our-product p, p {
    font-size: 0.9rem; }
  section {
    padding: 3rem 0; }
  .title-block {
    font-size: 2rem; }
  header h1 {
    font-size: 3rem; }
  .our-product {
    /* background: url(/img/skin_panel.png) no-repeat 110% 100%;
    background-size: auto; */
    position: relative;
    overflow: hidden; }
    .our-product .bg-mobile {
      position: absolute;
      right: -8rem;
      top: 15rem;
      width: 15rem;
      height: 15rem;
      background: url(/img/skin_panel.png) no-repeat 50% 50%;
      background-size: cover; }
  /*Disable Animation on Mobile Devices */
  .animated {
    /*CSS transitions */
    -webkit-transition-property: none !important;
    transition-property: none !important;
    /*CSS transforms */
    -ms-transform: none !important;
    -webkit-transform: none !important;
    transform: none !important;
    /*CSS animations */
    -webkit-animation: none !important;
    animation: none !important; } }

/* Extra Small Devices, Phones */
@media only screen and (max-width: 480px) {
  header h1 {
    font-size: 2.5rem; }
  header h3 {
    font-size: 1.3rem; }
  .title-block {
    font-size: 1.5rem; } }

/* Custom, iPhone Retina */
@media only screen and (max-width: 320px) {
  /* */ }

/*==========  Mobile First Method  ========== */
/* Custom, iPhone Retina */
@media only screen and (min-width: 320px) {
  /* */ }

/* Extra Small Devices, Phones */
@media only screen and (min-width: 480px) {
  /* */ }

/* Small Devices, Tablets */
@media only screen and (min-width: 768px) {
  /* */ }

/* Medium Devices, Desktops */
@media only screen and (min-width: 992px) {
  /* */ }

/* Large Devices, Wide Screens */
@media only screen and (min-width: 1200px) {
  /* */ }

c:\projects\kzn_gips_panel>gulp build
[13:55:37] Using gulpfile c:\projects\kzn_gips_panel\gulpfile.js
[13:55:37] Starting 'build'...
[13:55:37] Finished 'build' after 23 ms
SecurityError: DOM Exception 18: An attempt was made to break through the security policy of the user agent.

local:19 in n
local:19 in loadLocalStorageCSS

Что не так? Раньше все без проблем компилилось, пишут что возможно ошибки в css. Возмоэно это так, тк пустой css компилится без проблем.

Это как то связанно с html файлом