Attention: You have to install [VQMOD]
for Opencart ( https://github.com/vqmod/vqmod/releases ) for this to work!
You have to create an account here https://www.zopim.com/register/ to get a PROPERTY ID for your domain.
Edit the file knns_zendesk_chat_formerly_zopim.xml
and replace ADD-YOUR-PROPERTY-ID-HERE in line 16 with your PROPERTY ID.
Upload the file knns_zendesk_chat_formerly_zopim.xml
inside the folder /vqmod/xml/
.