Just saw this email come across to Bitwarden customers.
Hopefully this does not completely break the Bitwarden clients for us Vaultwarden users.
It included the following paragraph:
Keep your Bitwarden clients and servers up-to-date
In keeping with the Bitwarden software release support policy, it is important that your Bitwarden clients and self-hosted servers are using the most recent releases. Soon, Bitwarden clients will cease connecting to out-of-date self-hosted servers, and the Bitwarden cloud server will disallow connections from out-of-date clients. This is important for your security and ensures compatibility between servers and clients.