How to Fix Missing Icons Bug in Simple Social Icons Plugin

1) Create a file named sprite-map.svg in yout theme folder

For example: genesis-sample/images/sprite-map.svg

2) Copy and paste this xml snippet

<svg xmlns="http://www.w3.org/2000/svg" style="display: none;">
      <symbol id="social-email" viewbox="0 0 500 600">
        <path fill="currentColor" d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"></path>
      </symbol>
       
      <symbol id="social-facebook" viewbox="0 0 500 600">
        <path fill="currentColor" d="M400 32H48A48 48 0 0 0 0 80v352a48 48 0 0 0 48 48h137.25V327.69h-63V256h63v-54.64c0-62.15 37-96.48 93.67-96.48 27.14 0 55.52 4.84 55.52 4.84v61h-31.27c-30.81 0-40.42 19.12-40.42 38.73V256h68.78l-11 71.69h-57.78V480H400a48 48 0 0 0 48-48V80a48 48 0 0 0-48-48z"></path>
      </symbol>
       
      <symbol id="social-youtube" viewbox="0 0 500 600">
        <path fill="currentColor" d="M186.8 202.1l95.2 54.1-95.2 54.1V202.1zM448 80v352c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V80c0-26.5 21.5-48 48-48h352c26.5 0 48 21.5 48 48zm-42 176.3s0-59.6-7.6-88.2c-4.2-15.8-16.5-28.2-32.2-32.4C337.9 128 224 128 224 128s-113.9 0-142.2 7.7c-15.7 4.2-28 16.6-32.2 32.4-7.6 28.5-7.6 88.2-7.6 88.2s0 59.6 7.6 88.2c4.2 15.8 16.5 27.7 32.2 31.9C110.1 384 224 384 224 384s113.9 0 142.2-7.7c15.7-4.2 28-16.1 32.2-31.9 7.6-28.5 7.6-88.1 7.6-88.1z"></path>
      </symbol>
    
      <symbol id="social-instagram" viewbox="0 0 500 600">
        <path fill="currentColor" d="M224.1 141c-63.6 0-114.9 51.3-114.9 114.9s51.3 114.9 114.9 114.9S339 319.5 339 255.9 287.7 141 224.1 141zm0 189.6c-41.1 0-74.7-33.5-74.7-74.7s33.5-74.7 74.7-74.7 74.7 33.5 74.7 74.7-33.6 74.7-74.7 74.7zm146.4-194.3c0 14.9-12 26.8-26.8 26.8-14.9 0-26.8-12-26.8-26.8s12-26.8 26.8-26.8 26.8 12 26.8 26.8zm76.1 27.2c-1.7-35.9-9.9-67.7-36.2-93.9-26.2-26.2-58-34.4-93.9-36.2-37-2.1-147.9-2.1-184.9 0-35.8 1.7-67.6 9.9-93.9 36.1s-34.4 58-36.2 93.9c-2.1 37-2.1 147.9 0 184.9 1.7 35.9 9.9 67.7 36.2 93.9s58 34.4 93.9 36.2c37 2.1 147.9 2.1 184.9 0 35.9-1.7 67.7-9.9 93.9-36.2 26.2-26.2 34.4-58 36.2-93.9 2.1-37 2.1-147.8 0-184.8zM398.8 388c-7.8 19.6-22.9 34.7-42.6 42.6-29.5 11.7-99.5 9-132.1 9s-102.7 2.6-132.1-9c-19.6-7.8-34.7-22.9-42.6-42.6-11.7-29.5-9-99.5-9-132.1s-2.6-102.7 9-132.1c7.8-19.6 22.9-34.7 42.6-42.6 29.5-11.7 99.5-9 132.1-9s102.7-2.6 132.1 9c19.6 7.8 34.7 22.9 42.6 42.6 11.7 29.5 9 99.5 9 132.1s2.7 102.7-9 132.1z"></path>
      </symbol>
    
      <symbol id="social-linkedin" viewbox="0 0 500 600">
        <path fill="currentColor" d="M416 32H31.9C14.3 32 0 46.5 0 64.3v383.4C0 465.5 14.3 480 31.9 480H416c17.6 0 32-14.5 32-32.3V64.3c0-17.8-14.4-32.3-32-32.3zM135.4 416H69V202.2h66.5V416zm-33.2-243c-21.3 0-38.5-17.3-38.5-38.5S80.9 96 102.2 96c21.2 0 38.5 17.3 38.5 38.5 0 21.3-17.2 38.5-38.5 38.5zm282.1 243h-66.4V312c0-24.8-.5-56.7-34.5-56.7-34.6 0-39.9 27-39.9 54.9V416h-66.4V202.2h63.7v29.2h.9c8.9-16.8 30.6-34.5 62.9-34.5 67.2 0 79.7 44.3 79.7 101.9V416z"></path>
      </symbol>
      
      <symbol id="social-behance" viewbox="0 0 500 600">
        <path fill="currentColor" d="M232 237.2c31.8-15.2 48.4-38.2 48.4-74 0-70.6-52.6-87.8-113.3-87.8H0v354.4h171.8c64.4 0 124.9-30.9 124.9-102.9 0-44.5-21.1-77.4-64.7-89.7zM77.9 135.9H151c28.1 0 53.4 7.9 53.4 40.5 0 30.1-19.7 42.2-47.5 42.2h-79v-82.7zm83.3 233.7H77.9V272h84.9c34.3 0 56 14.3 56 50.6 0 35.8-25.9 47-57.6 47zm358.5-240.7H376V94h143.7v34.9zM576 305.2c0-75.9-44.4-139.2-124.9-139.2-78.2 0-131.3 58.8-131.3 135.8 0 79.9 50.3 134.7 131.3 134.7 61.3 0 101-27.6 120.1-86.3H509c-6.7 21.9-34.3 33.5-55.7 33.5-41.3 0-63-24.2-63-65.3h185.1c.3-4.2.6-8.7.6-13.2zM390.4 274c2.3-33.7 24.7-54.8 58.5-54.8 35.4 0 53.2 20.8 56.2 54.8H390.4z"></path>
      </symbol>
</svg>

3) Call this file with an action hook in functions.php

function add_sprite_map(){
    include('images/sprite-map.svg');
}
add_action('genesis_before', 'add_sprite_map');