Those JS files that the console refer to are not included on my end, and they look like some sort of minified/changed versions of the originals, as the file names does not match. Perhaps the minifier script that you use made a mistake somewhere?
I don't see this error on the demo site either, so I guess it is not directly related to the plugin: https://i.imgur.com/so87sqv.png
Do you see the same issue on the demo site?
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