Critical error when I click ‘show label’

In our Woocommerce order when I click on ‘Shows Label’ underneath Bpost. I get a critical error. Any idea whats causing this? Here’s the error log from my logs:

11-07-2023 @ 09:30:06 - [NOTICE] bpost_shipping_options_validation: bpost order ?: {"shipping_packages":[{"contents":{"f22e4747da1aa27e363d86d40ff442fe":{"key":"f22e4747da1aa27e363d86d40ff442fe","product_id":1939,"variation_id":0,"variation":[],"quantity":1,"data_hash":"b5c1d5ca8bae6d4896cf1807cdf763f0","_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":28.95,"line_subtotal_tax":0,"line_total":28.95,"line_tax":0,"data":{}},"3df098038c2b13a15a5d823dc45a6305":{"key":"3df098038c2b13a15a5d823dc45a6305","product_id":260,"variation_id":348,"variation":{"attribute_pa_kleur":"black"},"quantity":1,"data_hash":"3a64e10986826256cb42ecd6813ba1f3","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":27.95,"line_subtotal_tax":0,"line_total":27.95,"line_tax":0,"_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","data":{}}},"contents_cost":56.9,"applied_coupons":[],"user":{"ID":2},"destination":{"country":"BY","state":"Particulier","postcode":"","city":"Linden","address":"Korenbloemstraat 16","address_1":"Korenbloemstraat 16","address_2":"269"},"cart_subtotal":"56.9","shipping_quote_time":1699349406,"rate_cache":2642994761}],"chosen_shipping_methods":["custom_shipping_quote:16"]}
11-07-2023 @ 09:30:06 - [NOTICE] It is not a bpost shipping: ["custom_shipping_quote:16"]
11-07-2023 @ 09:30:16 - [NOTICE] bpost_shipping_options_validation: bpost order ?: {"shipping_packages":[{"contents":{"f22e4747da1aa27e363d86d40ff442fe":{"key":"f22e4747da1aa27e363d86d40ff442fe","product_id":1939,"variation_id":0,"variation":[],"quantity":1,"data_hash":"b5c1d5ca8bae6d4896cf1807cdf763f0","_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":28.95,"line_subtotal_tax":0,"line_total":28.95,"line_tax":0,"data":{}},"3df098038c2b13a15a5d823dc45a6305":{"key":"3df098038c2b13a15a5d823dc45a6305","product_id":260,"variation_id":348,"variation":{"attribute_pa_kleur":"black"},"quantity":1,"data_hash":"3a64e10986826256cb42ecd6813ba1f3","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":27.95,"line_subtotal_tax":0,"line_total":27.95,"line_tax":0,"_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","data":{}}},"contents_cost":56.9,"applied_coupons":[],"user":{"ID":2},"destination":{"country":"BY","state":"Particulier","postcode":"","city":"Linden","address":"Korenbloemstraat 16","address_1":"Korenbloemstraat 16","address_2":"269"},"cart_subtotal":"56.9","shipping_quote_time":1699349416,"rate_cache":406654888}],"chosen_shipping_methods":["custom_shipping_quote:16"]}
11-07-2023 @ 09:30:16 - [NOTICE] It is not a bpost shipping: ["custom_shipping_quote:16"]
11-07-2023 @ 09:30:27 - [NOTICE] bpost_shipping_options_validation: bpost order ?: {"shipping_packages":[{"contents":{"f22e4747da1aa27e363d86d40ff442fe":{"key":"f22e4747da1aa27e363d86d40ff442fe","product_id":1939,"variation_id":0,"variation":[],"quantity":1,"data_hash":"b5c1d5ca8bae6d4896cf1807cdf763f0","_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":28.95,"line_subtotal_tax":0,"line_total":28.95,"line_tax":0,"data":{}},"3df098038c2b13a15a5d823dc45a6305":{"key":"3df098038c2b13a15a5d823dc45a6305","product_id":260,"variation_id":348,"variation":{"attribute_pa_kleur":"black"},"quantity":1,"data_hash":"3a64e10986826256cb42ecd6813ba1f3","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":27.95,"line_subtotal_tax":0,"line_total":27.95,"line_tax":0,"_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","data":{}}},"contents_cost":56.9,"applied_coupons":[],"user":{"ID":2},"destination":{"country":"BE","state":"","postcode":"3012","city":"Leuven","address":"Kolonel Begaultlaan 9","address_1":"Kolonel Begaultlaan 9","address_2":"269"},"cart_subtotal":"56.9","rate_cache":3452343080}],"chosen_shipping_methods":["bpost_shipping"]}
11-07-2023 @ 09:30:27 - [NOTICE] It is a bpost shipping: ["bpost_shipping"]
11-07-2023 @ 09:30:27 - [NOTICE] bpost_shm_already_called = : []
11-07-2023 @ 09:30:27 - [WARNING] Please, specify a bpost delivery method!: []
11-07-2023 @ 09:30:33 - [NOTICE] bpost_shipping_options_validation: bpost order ?: {"shipping_packages":[{"contents":{"f22e4747da1aa27e363d86d40ff442fe":{"key":"f22e4747da1aa27e363d86d40ff442fe","product_id":1939,"variation_id":0,"variation":[],"quantity":1,"data_hash":"b5c1d5ca8bae6d4896cf1807cdf763f0","_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":28.95,"line_subtotal_tax":0,"line_total":28.95,"line_tax":0,"data":{}},"3df098038c2b13a15a5d823dc45a6305":{"key":"3df098038c2b13a15a5d823dc45a6305","product_id":260,"variation_id":348,"variation":{"attribute_pa_kleur":"black"},"quantity":1,"data_hash":"3a64e10986826256cb42ecd6813ba1f3","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":27.95,"line_subtotal_tax":0,"line_total":27.95,"line_tax":0,"_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","data":{}}},"contents_cost":56.9,"applied_coupons":[],"user":{"ID":2},"destination":{"country":"BE","state":"","postcode":"3012","city":"Leuven","address":"Kolonel Begaultlaan 9","address_1":"Kolonel Begaultlaan 9","address_2":"269"},"cart_subtotal":"56.9","rate_cache":3863625372}],"chosen_shipping_methods":["bpost_shipping"]}
11-07-2023 @ 09:30:33 - [NOTICE] It is a bpost shipping: ["bpost_shipping"]
11-07-2023 @ 09:30:33 - [NOTICE] bpost_shm_already_called = : []
11-07-2023 @ 09:30:33 - [WARNING] Please, specify a bpost delivery method!: []
11-07-2023 @ 09:32:34 - [NOTICE] bpost_shipping_options_validation: bpost order ?: {"shipping_packages":[{"contents":{"f22e4747da1aa27e363d86d40ff442fe":{"key":"f22e4747da1aa27e363d86d40ff442fe","product_id":1939,"variation_id":0,"variation":[],"quantity":1,"data_hash":"b5c1d5ca8bae6d4896cf1807cdf763f0","_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":28.95,"line_subtotal_tax":0,"line_total":28.95,"line_tax":0,"data":{}},"3df098038c2b13a15a5d823dc45a6305":{"key":"3df098038c2b13a15a5d823dc45a6305","product_id":260,"variation_id":348,"variation":{"attribute_pa_kleur":"black"},"quantity":1,"data_hash":"3a64e10986826256cb42ecd6813ba1f3","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":27.95,"line_subtotal_tax":0,"line_total":27.95,"line_tax":0,"_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","data":{}}},"contents_cost":56.9,"applied_coupons":[],"user":{"ID":2},"destination":{"country":"BE","state":"Particulier","postcode":"3012","city":"Leuven","address":"Kolonel Begaultlaan 9","address_1":"Kolonel Begaultlaan 9","address_2":"269"},"cart_subtotal":"56.9","rate_cache":3716973732}],"chosen_shipping_methods":["bpost_shipping"]}
11-07-2023 @ 09:32:34 - [NOTICE] It is a bpost shipping: ["bpost_shipping"]
11-07-2023 @ 09:32:34 - [NOTICE] bpost_shm_already_called = : ["mollie_wc_gateway_bancontact","mollie_wc_gateway_paypal"]
11-07-2023 @ 09:32:34 - [WARNING] Please, specify a bpost delivery method!: []
11-07-2023 @ 09:32:41 - [NOTICE] bpost_shipping_options_validation: bpost order ?: {"shipping_packages":[{"contents":{"f22e4747da1aa27e363d86d40ff442fe":{"key":"f22e4747da1aa27e363d86d40ff442fe","product_id":1939,"variation_id":0,"variation":[],"quantity":1,"data_hash":"b5c1d5ca8bae6d4896cf1807cdf763f0","_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":28.95,"line_subtotal_tax":0,"line_total":28.95,"line_tax":0,"data":{}},"3df098038c2b13a15a5d823dc45a6305":{"key":"3df098038c2b13a15a5d823dc45a6305","product_id":260,"variation_id":348,"variation":{"attribute_pa_kleur":"black"},"quantity":1,"data_hash":"3a64e10986826256cb42ecd6813ba1f3","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":27.95,"line_subtotal_tax":0,"line_total":27.95,"line_tax":0,"_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","data":{}}},"contents_cost":56.9,"applied_coupons":[],"user":{"ID":2},"destination":{"country":"BE","state":"Particulier","postcode":"3012","city":"Leuven","address":"Kolonel Begaultlaan 9","address_1":"Kolonel Begaultlaan 9","address_2":"269"},"cart_subtotal":"56.9","rate_cache":849202870}],"chosen_shipping_methods":["local_pickup:2"]}
11-07-2023 @ 09:32:41 - [NOTICE] It is not a bpost shipping: ["local_pickup:2"]
11-07-2023 @ 09:33:45 - [NOTICE] bpost_shipping_options_validation: bpost order ?: {"shipping_packages":[{"contents":{"f22e4747da1aa27e363d86d40ff442fe":{"key":"f22e4747da1aa27e363d86d40ff442fe","product_id":1939,"variation_id":0,"variation":[],"quantity":1,"data_hash":"b5c1d5ca8bae6d4896cf1807cdf763f0","_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":28.95,"line_subtotal_tax":0,"line_total":28.95,"line_tax":0,"data":{}},"3df098038c2b13a15a5d823dc45a6305":{"key":"3df098038c2b13a15a5d823dc45a6305","product_id":260,"variation_id":348,"variation":{"attribute_pa_kleur":"black"},"quantity":1,"data_hash":"3a64e10986826256cb42ecd6813ba1f3","line_tax_data":{"subtotal":[],"total":[]},"line_subtotal":27.95,"line_subtotal_tax":0,"line_total":27.95,"line_tax":0,"_cpo_calc_option":false,"_cpo_cart_item_id":"","_cpo_product_image":"","_cpo_data":"","data":{}}},"contents_cost":56.9,"applied_coupons":[],"user":{"ID":2},"destination":{"country":"BE","state":"","postcode":"3012","city":"Leuven","address":"Kolonel Begaultlaan 9","address_1":"Kolonel Begaultlaan 9","address_2":"269"},"cart_subtotal":"56.9","rate_cache":1131859569}],"chosen_shipping_methods":["local_pickup:2"]}
11-07-2023 @ 09:33:45 - [NOTICE] It is not a bpost shipping: ["local_pickup:2"]
11-07-2023 @ 10:57:19 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 10:57:30 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 10:58:03 - [WARNING] The order does not contain order reference: {"order_id":4738}
11-07-2023 @ 10:58:40 - [WARNING] The order does not contain order reference: {"order_id":4730}
11-07-2023 @ 10:59:26 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 10:59:49 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 12:29:21 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 12:30:02 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 12:30:41 - [WARNING] The order does not contain order reference: {"order_id":4738}
11-07-2023 @ 12:52:19 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 12:52:41 - [WARNING] The order does not contain order reference: {"order_id":4738}
11-07-2023 @ 12:57:24 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 12:57:44 - [WARNING] The order does not contain order reference: {"order_id":4738}
11-07-2023 @ 12:59:15 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 13:14:54 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 13:16:28 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 13:58:00 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 14:00:14 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 14:01:01 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 14:05:26 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 14:06:42 - [WARNING] The order does not contain order reference: {"order_id":4738}
11-07-2023 @ 14:08:28 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 14:33:51 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 14:36:41 - [WARNING] The order does not contain order reference: {"order_id":4740}
11-07-2023 @ 14:40:42 - [WARNING] The order does not contain order reference: {"order_id":4740}

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