fancyboxforwp is not a function

Hello, I’m not having issues with the plugin on the frontend as far as I can tell, though I’ve had numerous warnings in the dev console in the past.

How can I resolve the Uncaught TypeError below?
And is this plugin no longer maintained, will we see any updates in the future?

Error Message:

(index):97 Uncaught TypeError: jQuery(...).fancyboxforwp is not a function
    at HTMLDocument.<anonymous> ((index):97)
    at i (jquery.js?ver=1.12.4-wp:2)
    at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4-wp:2)
    at Function.ready (jquery.js?ver=1.12.4-wp:2)
    at HTMLDocument.J (jquery.js?ver=1.12.4-wp:2)

Referencing this line of code:
https://github.com/ColorlibHQ/fancybox-for-wordpress/blob/master/fancybox.php#L397

Thanks!