I am also getting an error trying to use the new CDS-beta. My error message is related to licensing
RuntimeError: 403 Client Error: required licences not accepted
required licences not accepted; please accept the following licences to proceed: [{'id': 'licence-to-use-copernicus-products', 'revision': 12}]
On my new CDS-beta account I have accepted all three terms & conditions
So I checked inside my ECMWF account (as a side note I find it confusing that the new CDS account has settings and while it says they’re taken from my ECMWF ACC it still looks like I could change them) and couldn’t find any T&Cs I could confirm. Maybe its on this link that is broken Keycloak Account Management