On a Joomla! 3.9.15 system, after upgrading from CiviCRM 5.22.0 to 5.23.0 payment processing for fails for both paypal (credit card) and pay later options. When either is selected, the request for additional information (e.g. credit card selection, billing address, etc) is not display and the 'submit' for the form no longer works (it gets grayed out). The work-around is go back to version 5.22.0 (with the 5.23.0 database). The payment processing and form submission then works.