Unicredit Bulbank Bulgaria Authorization failure

Hello, having issue authorizing integration with Unicredit Bulbank via GoCardless. Following setup I get redirected to

https://crs.bulbank.bg/?consentId=XXXXXX&correlationId=YYYY&authorisationId=ZZZZ

which returns 404 not found, Is there a way to contact GoCardless about this, I assume it has something to with Bulgaria’s transition to EUR making the bank redo/reconfigure some its APIs?