Error when bulk delete orders

Hi,

I noticed this error when im was try to bulk delete some orders.

[25-May-2021 09:43:18 UTC] PHP Fatal error:  Uncaught ErrorException: unlink(/home/luxvetco/weterynarz.online/wp-content/uploads/woocommerce-pdf-invoices/attachments/): Is a directory in /home/luxvetco/weterynarz.online/wp-includes/functions.php:6726
Stack trace:
#0 [internal function]: TypeRocket\Services\ErrorService->TypeRocket\Services\{closure}(2, 'unlink(/home/lu...', '/home/luxvetco/...', 6726, Array)
#1 /home/luxvetco/weterynarz.online/wp-includes/functions.php(6726): unlink('/home/luxvetco/...')
#2 /home/luxvetco/weterynarz.online/wp-content/plugins/woocommerce-pdf-invoices/includes/abstracts/abstract-document.php(275): wp_delete_file('/home/luxvetco/...')
#3 /home/luxvetco/weterynarz.online/wp-content/plugins/woocommerce-pdf-invoices/includes/abstracts/abstract-invoice.php(367): BEWPI_Abstract_Document::delete('/home/luxvetco/...')
#4 /home/luxvetco/weterynarz.online/wp-content/plugins/woocommerce-pdf-invoices/includes/class-invoice.php(60): BEWPI_Abstract_Invoice::delete(6874)
#5 /home/luxvetco/weterynarz.online/wp-includes/class-wp-hook.php( in /home/luxvetco/weterynarz.online/wp-includes/functions.php on line 6726

Im using latest plugin version and Woocommerce 4.7.0.