My guess is not reading the documentation :p
You’ll need to pass either the entry_id or url_title to your embeded template.
There is an example here: http://leevigraham.com/cms-customisation/expressionengine/lg-better-meta/#embedded-templates
and more specific cases here: http://leevigraham.com/cms-customisation/expressionengine/lg-better-meta/#outputting-entry-meta-data
The examples above use LG Better Meta 1.7.0
Hope that helps
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