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Core Contacts plugin 0.2.11 has a bug in which a breaking change to the order of the arguments for the method navigator.contacts.find were changed.
Here is a console log from an app deployed to an Android device:
This branch has a fix:
https://github.com/apache/cordova-plugin-contacts/tree/432b0143442a689e349e347f33ee85aeb2d28663
Here is a console log from an app deployed to an Android device:
Uncaught TypeError: Wrong type for parameter "successCB" of contacts.find: Expected Function, but got Array
This branch has a fix:
https://github.com/apache/cordova-plugin-contacts/tree/432b0143442a689e349e347f33ee85aeb2d28663