Issue with Date Tag

Hello all,

I have two sites which are almost duplicates. They use all of the same plugins and functions. I have installed the same contact form on both which uses the datepicker (date) in the following format:

[date date-123 "today"]
[date date-321 "tomorrow"]

On one, site it works correctly, however on the other site it does not default:

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This is the js error which I receive in the console
The specified value “today” does not conform to the required format, “yyyy-MM-dd”