title: error installing angular cli how can i fix it?
body: <p>When I run the command  <code>npm install -g @angular/cli</code>, I  get this error.</p>
  <pre><code>λ npm install -g @angular/cli
  npm notice Beginning October 4, 2021, all connections to the npm registry - including for package installation - must use TLS 1.2 or higher. You are currently using plaintext http to connect. Please visit the GitHub blog for more information: https://github.blog/2021-08-23-npm-registry-deprecating-tls-1-0-tls-1-1/
  npm notice Beginning October 4, 2021, all connections to the npm registry - including for package installation - must use TLS 1.2 or higher. You are currently using plaintext http to connect. Please visit the GitHub blog for more information: https://github.blog/2021-08-23-npm-registry-deprecating-tls-1-0-tls-1-1/
  npm WARN deprecated har-validator@5.1.5: this library is no longer supported
  npm WARN deprecated uuid@3.4.0: Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.
  npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
  npm ERR! Cannot read properties of null (reading 'pickAlgorithm')
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     C:\Users\rossd\AppData\Local\npm-cache\_logs\2021-10-27T16_56_57_347Z-debug.log
  </code></pre>
  <p>How can I solve this?</p>
  <p>My npm v is 8.1.0.
  My node v is v16.13.0.</p>