Error messages about eme_payments.php appeared after upgrade to 2.2.92

We run a booking system for rides run by our cycling club (https://wirralcycling.org/), but last night after the upgrade of EME from version 2.2.91 to 2.2.92, the following error messages appeared (each set of two appears twice for every booking).

Warning: preg_match_all(): Compilation failed: reference to non-existent subpattern at offset 32 in /homepages/22/d826381705/htdocs/clickandbuilds/WirralCyclingGroup/wp-content/plugins/events-made-easy/eme_payments.php on line 3220

Warning: Invalid argument supplied for foreach() in /homepages/22/d826381705/htdocs/clickandbuilds/WirralCyclingGroup/wp-content/plugins/events-made-easy/eme_payments.php on line 3221

Apart from displaying the error messages the site seems to work properly (although we do not charge for bookings)

Our website is hosted on Ionos, under WordPress 6.0.1 with PHP 7.4.30

The page I need help with: [log in to see the link]