Hello team, I have the same problem that Claire reported since updating WooCommerce to the latest version. Maybe you can get some additional information out of this error message:
WordPress 5.9.3
WooCommerce 6.3.1
Premmerce Wholesale Pricing for WooCommerce (Version 1.1.8)
PHP 8.1.4
Fehler-Details
==============
Ein Fehler vom Typ E_ERROR wurde in der Zeile 532 der Datei /REDACTED/wp-content/plugins/premmerce-woocommerce-wholesale-pricing/src/Models/Model.php verursacht. Fehlermeldung: Uncaught TypeError: Premmerce\PriceTypes\Models\Model::getLowestAvailablePriceForUserByOrderItem(): Argument #1 ($user) must be of type WP_User, bool given, called in /REDACTED/wp-content/plugins/premmerce-woocommerce-wholesale-pricing/src/Admin/AdminOrders.php on line 61 and defined in /REDACTED/wp-content/plugins/premmerce-woocommerce-wholesale-pricing/src/Models/Model.php:532
Stack trace:
#0 /REDACTED/wp-content/plugins/premmerce-woocommerce-wholesale-pricing/src/Admin/AdminOrders.php(61): Premmerce\PriceTypes\Models\Model->getLowestAvailablePriceForUserByOrderItem(false, Object(WC_Order_Item_Product), 18.0)
#1 /REDACTED/wp-content/plugins/premmerce-woocommerce-wholesale-pricing/src/Admin/AdminOrders.php(46): Premmerce\PriceTypes\Admin\AdminOrders->setLowestPossiblePriceToWcOrderItem(Object(WC_Order_Item_Product), 0)
#2 /REDACTED/wp-includes/class-wp-hook.php(309): Premmerce\PriceTypes\Admin\AdminOrders->updateOrderProductsPrices(Object(Automattic\WooCommerce\Admin\Overrides\Order))
#3 /REDACTED/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters('', Array)
#4 /REDACTED/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#5 /REDACTED/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-order.php(184): do_action('woocommerce_bef...', Object(Automattic\WooCommerce\Admin\Overrides\Order), Object(WC_Data_Store))
#6 /REDACTED/wp-content/plugins/woocommerce/includes/class-wc-order.php(221): WC_Abstract_Order->save()
#7 /REDACTED/wp-content/plugins/woocommerce/includes/abstracts/abstract-wc-order.php(1682): WC_Order->save()
#8 /REDACTED/wp-content/plugins/woocommerce/includes/admin/wc-admin-functions.php(419): WC_Abstract_Order->update_taxes()
#9 /REDACTED/wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-order-items.php(54): wc_save_order_items(8199, Array)
#10 /REDACTED/wp-includes/class-wp-hook.php(309): WC_Meta_Box_Order_Items::save(8199)
#11 /REDACTED/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array)
#12 /REDACTED/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#13 /REDACTED/wp-content/plugins/woocommerce/includes/admin/class-wc-admin-meta-boxes.php(222): do_action('woocommerce_pro...', 8199, Object(WP_Post))
#14 /REDACTED/wp-includes/class-wp-hook.php(309): WC_Admin_Meta_Boxes->save_meta_boxes(8199, Object(WP_Post))
#15 /REDACTED/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(8199, Array)
#16 /REDACTED/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#17 /REDACTED/wp-includes/post.php(4687): do_action('save_post', 8199, Object(WP_Post), true)
#18 /REDACTED/wp-includes/post.php(4789): wp_insert_post(Array, false, true)
#19 /REDACTED/wp-admin/includes/post.php(426): wp_update_post(Array)
#20 /REDACTED/wp-admin/post.php(227): edit_post()
#21 {main}
thrown