Credit Card fields not clickable

Hi all,
My customers are unable to click on the credit card fields. Checking the console error, I get this message:

wc-square.js:303 Uncaught TypeError: this.enabled_card_types.includes is not a function
    at WC_Square_Payment_Form_Handler.handle_card_brand_change (wc-square.js:303)
    at WC_Square_Payment_Form_Handler.handle_input_event (wc-square.js:273)
    at t.inputEventReceived [as _inputEventCallback] (wc-square.js:238)
    at t.value (paymentform?ver=2.5.3:1)
    at Array.<anonymous> (paymentform?ver=2.5.3:1)
    at r.handle (paymentform?ver=2.5.3:1)

I’m not too technical to know what this means. It would seem that it’s a Square plugin js issue. It’s currently up to date. Any suggestions would be greatly appreciated.

Thanks,
t.