Date field doesn't show popup selector

I think we saw date pop selector at some point during our development and now during final go live testing it seems to have disappeared. I thought we should see some java script put in there by this plugin, but we couldn’t find any. Could it have been deleted somehow?
Web page with problem ate control is
https://www.mrrsllc.com/wp/township-of-aston-cert-req-prop-payoff/

Thanks
Brad

https://www.ads-software.com/plugins/si-contact-form/