This is an old post from 2018, have you searched the forum for previous posts about this too as per our forum guidelines and find one like this about using Tracking and Analytics?
https://www.wix.com/corvid/forum/community-discussion/integration-new-plugin-customer-chat-facebook
Or use this here with the Lite version
How to Add Facebook Chat to Wix (2020)
Please post a new post if you still require help.