Issue with Bpost upgrade ?

Hello

Can you please help me ?
I have a fatal error when I’m trying to download the shipping labels from my website :

Fatal error: Uncaught Exception: File is empty. Please upload something more substantial. This error could also be caused by uploads being disabled in your php.ini file or by post_max_size being defined as smaller than upload_max_filesize in php.ini.
in?/home/customer/www/xxx.be/public_html/wp-content/plugins/bpost-shipping/classes/label/class-wc-bpost-shipping-label-attachment.php?on line?84

Call stack:

1. WC_BPost_Shipping\Label\WC_BPost_Shipping_Label_Attachment::create_attachment()
   wp-content/plugins/bpost-shipping/classes/label/class-wc-bpost-shipping-label-attachment.php:113
2. WC_BPost_Shipping\Label\WC_BPost_Shipping_Label_Attachment::get_url()
   wp-content/plugins/bpost-shipping/classes/label/class-wc-bpost-shipping-label-retriever.php:132
3. WC_BPost_Shipping\Label\WC_BPost_Shipping_Label_Retriever::get_label_attachment_url()
   wp-content/plugins/bpost-shipping/classes/label/class-wc-bpost-shipping-label-retriever.php:107
4. WC_BPost_Shipping\Label\WC_BPost_Shipping_Label_Retriever::get_labels_contents()
   wp-content/plugins/bpost-shipping/classes/label/class-wc-bpost-shipping-label-controller.php:85
5. WC_BPost_Shipping\Label\WC_BPost_Shipping_Label_Controller::load_template()
   wp-content/plugins/bpost-shipping/classes/class-wc-bpost-shipping-hooks.php:320
6. WC_BPost_Shipping_Hooks::bpost_virtual_page_label()
   wp-includes/class-wp-hook.php:310
7. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:334
8. WP_Hook::do_action()
   wp-includes/plugin.php:517
9. do_action()
   wp-content/plugins/woocommerce/includes/class-wc-api.php:161
10. WC_API::handle_api_requests()
    wp-includes/class-wp-hook.php:310
11. WP_Hook::apply_filters()
    wp-includes/class-wp-hook.php:334
12. WP_Hook::do_action()
    wp-includes/plugin.php:565
13. do_action_ref_array()
    wp-includes/class-wp.php:398
14. WP::parse_request()
    wp-includes/class-wp.php:779
15. WP::main()
    wp-includes/functions.php:1335
16. wp()
    wp-blog-header.php:16
17. require()
    index.php:17