We’ve become aware of a bug in the PDB Connector family of nodes (all nodes with the query builder part of the node settings panel are affected). This bug was introduced inadvertently in March this year when we added a couple of new query types, and causes the settings validation step of any node created prior to then to fail.
We are working on a fix for this which we hope to have available in the next few days.
Apologies for any inconvenience this has caused,
Steve