Hi again,
it looks like we have identified the culprit. The issue is quite technical, but should only come up if embedded data apps are allowed to be embedded in iframes.
KNIME Analytics Platform clients and Executors in version 4.7.2 and newer will fail to connect via KNIME Server Connector while the CookieProcessor entry is set in <apache-tomcat>/conf/Catalina/localhost/knime.xml.
As a knimeadmin / server administrator, a workaround would be to remove the CookieProcessor entry and restart KNIME Server. However, this will also disable support for embedding Data Apps in iframes.
We will provide a proper solution in the next KNIME Server version (4.16.5). I’m very sorry for the inconvenience this may cause.
Kind regards
Marvin
EDIT: adjusted affected version from 4.7.3 to 4.7.2.