Navigating to PXC/Galera Cluster Summary leads to No data on dashboards, and no available cluster in the Cluster dropdown, even when one is available in PMM

Navigating to PXC/Galera Cluster Summary leads to No data on dashboards, and no available cluster in the Cluster dropdown, even when one is available in PMM.

Expected behaviour would be to see values in the graphs because the first available cluster is automatically selected.

https://pmmdemo.percona.com/graph/d/pxc-cluster-summary/pxc-galera-cluster-summary?orgId=1&from=now-12h&to=now&refresh=1m&var-interval=$__auto_interval_interval&var-service_name=All&var-cluster=&var-node_name=ps8&var-environment=All&var-replication_set=All&var-database=All&var-node_type=generic&var-service_type=