Mobile Fonts Not Showing - No Custom Fonts

[chloecreativest]

Hi! I am using Warehouse theme on my shopify store: https://www.shop.dralexrinehart.com/. Headings used are Playfair Display and body text is Nunito Sans - both of which are available from Shopify's font choices. These fonts are not showing on the mobile version AND we are getting errors on Google Dev tools. Any help on how to fix this?