OK, new IBANs don’t work for quite an amount of people. Me too, I can’t send money to Revolut anymore.
Paramount Question: Can I still send funds to the old account details, or should I stop using Revolut for a while?
According to support, you can top up your card using the old way (LOYDs IBAN + reference number). This is how I did it and it seems to work fine. I hope it works out for you too.