Hi Marvin,
This relates to some heavy changes to the remote RESTful API around 6 weeks ago (see PDB Connector Issues) - Some of the queries (full text, and most things relating to chemical components) were moved to a separate search service with the RESTful API which broke any query involving any of those search types.
I have pushed an updated version which managed to fix this in the node without breaking any queries. That fix is available as of yesterday in the stable build for KNIME versions 4.1, 4.2 and 4.3. There are a few issues I need to work through with Gabriel - hopefully next week - to get them available in the 4.4 release channel and nightly builds.
Hopefully those should fix the problems.
Steve