PHP error after updates

Hello – we recently updated both this plugin and PHP and we are now seeing this error, multiple times:

PHP message: PHP Fatal error: Uncaught DivisionByZeroError: Division by zero in /public/wp-content/plugins/elex-woocommerce-role-based-pricing-plugin-basic/includes/elex-price-discount-admin.php:536

I thought it might be the zero dollar items we had, but after correcting those, this error still appears.

Plugin version is at 1.4.3; PHP is at 8.2; all other plugins are up-to-date. Have already tried deactivating all other plugins, but the issue persists.