The if statement to check if postcode and house_number are filled in appears to be faulty.
I get the following error in vendor/tig/postcode-magento2/view/base/web/js/postcode-handler/postcode-nl.js
jQuery.Deferred exception: this.data.house_number.match(...) is null
The if statement determines if the postcode and house_number are a string, but the string could still be empty.
When running the following regex expression, the result of match would be null so you get an error when selecting the first element in the array.
this.data.house_number.match(/^\d+/)[0])
Screenshots


- Magento version: 2.4.5-p9
- PHP version: [8.1]