Hi,
I have checked on local PC Using Mamp, There is no error. Please check followings:
#1: Get Latest Version of Theme from Envato
#2: Update WP / PHP to Latest Version.
#3: Re-install it and let me know.
Let me know.
Thanks,
Did you Upload the custom font files into css/fonts folder inside theme folder?
Normally you have to upload .woff font type and woff2.