The EU VIES team implemented a forward from http to https requests on the 17th April 2020. This leads to the situation, for some systems, that you can not validate VAT numbers in your Magento store with the old address (http://ec.europa.eu/taxation_customs/vies/checkVatService.wsdl) anymore.

Many people asked for the Magento2 version of our popular EU VAT Enhanced module. We were working hard and will release the first version shortly.