title: TypeError in plugin 'gulp-webp-css'
body: <p>I try to save changes in my code, but I have this issue:</p>
  <pre><code>[00:49:04] 'html' errored after 43 ms
  [00:49:04] TypeError in plugin 'gulp-webp-css'
  Message:
      Cannot read property '0' of null
  Details:
      domainEmitter: [object Object]
      domain: [object Object]
      domainThrown: false
  [00:49:04] 'default' errored after 124 ms
  </code></pre>
  <p>Here's the link to my gulpfile.js code - <a href="https://jsfiddle.net/yLo9b4na/" rel="nofollow noreferrer">https://jsfiddle.net/yLo9b4na/</a></p>
  <p>I tried to look for reasons for several hours, but did not succeed.</p>
  <p>Has anyone encountered such a problem? I would be grateful for any help.</p>