Create appointment from Dashboard – Date Error

Hello,

I cannot create an appointment from Dashboard because the Date filed is not working.
When I inspect with Chrome, appears this error:

Uncaught TypeError: Cannot read property 'dateFormat' of undefined
    at n.edit (settings.prod.js?ver=3.4.13:842)
    at n.addNew (settings.prod.js?ver=3.4.13:541)
    at HTMLDivElement.dispatch (jquery.min.js?ver=3.5.1:2)
    at HTMLDivElement.v.handle (jquery.min.js?ver=3.5.1:2)

Can you help me?
Thanks

Wordpres 5.7.1
Php 7.0
EasyAppointment updated

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