When I try to get the version number of an existing installation that wasn't created by WP CLI I get an error:
wp core version --path='/Users/plee/clients/burger_king/wp'
The error message is
WP-CLI needs WordPress 3.7 or later to work properly. The version currently installed is .
You see that somehow it recognizes a WordPress installation but it can't read the version number. It is a working installation with the newest core update.
Is there any way to make this visible to WP CLI?