Error undefined on home page

Whenever I load the www.computerplanet.co.ke homepage , I get a pop up error

Error

Undefined.
The error comes on the homepage itself, and not on the other pages.
https and http settings are configured well. works fine on localhost server, but error is persistent.

Please help.

I do not see the error?

Thanks Paul.

The error occurs when the internet connection is slow. Apparently the awesome font also do not load when the error pops up. However, after refreshing the site again, awesome fonts are loaded and the error does not come.

I think this is a known issue with 2.3.0.2

I solved the error.

Basically, the config file defines http and https with the www prefix to the site. On typing the site address without the www, the error comes and the awesome fonts do not load.

I added the following to the htaccess file

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

This sorted out everything.