Icon class not work

After updating my project to version 7.5.3 of Angular Pro MDB, most of the icons do not appear.I tried changing from fa to far, fas and it did not work.

This working:

   <ul class="text-lg-left list-unstyled ml-4">
         <li>
            <p><i class="fa fa-map-marker amber-text pr-2"></i>Espirito Santo, Brasil</p>
         </li>
         <li>
           <!---p><i class="fa fa-phone amber-text pr-2"></i>+55 27 3344 5688</p-->
         </li>
         <li>
            <p><i class="fa fa-envelope amber-text pr-2"></i>info@tecnopharmagroup.com.br</p>
         </li>
    </ul>

This not working:

<links>
            <hr class="hr-light my-4">
            <ul class="list-inline text-center list-unstyled">
              <li class="list-inline-item">
                <a class="p-2 fa-lg fa-ic">
                  <i class="fa fa-facebook indigo-text"></i>
                </a>
              </li>
              <li class="list-inline-item">
                <a class="p-2 fa-lg tw-ic">
                  <i class="fa fa-twitter cyan-text"></i>
                </a>
              </li>
              <li class="list-inline-item">
                <a class="p-2 fa-lg gp-ic">
                  <i class="fa fa-google-plus red-text"></i>
                </a>
              </li>
              <li class="list-inline-item">
                <a class="p-2 fa-lg ins-ic">
                  <i class="fa fa-instagram pink-text"> </i>
                </a>
              </li>
              <li class="list-inline-item">
                <a class="p-2 fa-lg li-ic">
                  <i class="fa fa-linkedin blue-text"> </i>
                </a>
              </li>
            </ul>
          </links>

Angular.json

            "styles": [
          {
            "input": "node_modules/@fortawesome/fontawesome-free/scss/fontawesome.scss"
          },
          {
            "input": "node_modules/@fortawesome/fontawesome-free/scss/solid.scss"
          },
          {
            "input": "node_modules/@fortawesome/fontawesome-free/scss/regular.scss"
          },
          {
            "input": "node_modules/@fortawesome/fontawesome-free/scss/brands.scss"
          },

So I removed the following lines from angular.json as explained in some posts here, but it did not work!

 "styles": [
          /** "node_modules/@fortawesome/fontawesome-free/scss/fontawesome.scss",
          "node_modules/@fortawesome/fontawesome-free/scss/solid.scss",
          "node_modules/@fortawesome/fontawesome-free/scss/regular.scss",
          "node_modules/@fortawesome/fontawesome-free/scss/brands.scss", */