Uncaught Error when marking orders as spam

Woocommerce site is getting a run of spam orders. When I try to mark orders as spam, I get this uncaught error message from Query Monitor, and the order is not moved to spam. None of the spam orders are showing in my Cleantalk dash. I have just updated Cleantalk Antispam to Version 6.64. WordPress is Version 6.8.2 and Woocommerce Version 10.1.2

Uncaught Error: Class “Cleantalk\Antispam\IntegrationsByClass\WC_Order” not found
in ***/public_html/wp-content/plugins/cleantalk-spam-protect/lib/Cleantalk/Antispam/IntegrationsByClass/Woocommerce.php on line 622

Call stack:

1. Cleantalk\A\I\Woocommerce::addSpamActionToBulkHandle('/wp-admin/edit.php?post_type=shop_order&paged=1', 'spamorder', array)
   wp-includes/class-wp-hook.php:324
2. WP_Hook::apply_filters('/wp-admin/edit.php?post_type=shop_order&paged=1', array)
   wp-includes/plugin.php:205
3. apply_filters('handle_bulk_actions-edit-shop_order', '/wp-admin/edit.php?post_type=shop_order&paged=1', 'spamorder', array)
   wp-admin/edit.php:222

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