Customer chat plugin Facebook SDK

Hi

I love this plugin. It fits my site perfectly. However after inspecting my site I found an SDK error:

##########################
# The CustomerChat plugin is no longer part of the main Facebook SDK.
# To continue using it please use the correct SDK URL,
# meaning replace sdk.js with sdk/xfbml.customerchat.js.
# For more details see https://developers.facebook.com/docs/messenger-platform/discovery/customer-chat-plugin/sdk
##########################

This error seems to only be visible during a chrome light house test.

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