Hi Sébastien,
many thanks for the details!
I recall that we had this issue in the pre-release version, but we fixed it and it should definitely not occur in the released 2.4 version. The error suggests, that the Palladian KNIME node code accesses an older version of the core Palladian lib (hence the java.lang.NoSuchMethodError). This in turn suggests, that something with the KNIME installation is messed up.
The forum often suggests the ominous -clean parameter for fixing any kind of issues related to broken extension installations, so I think this would be worth giving a try (see e.g. here for instructions)
If this still does not help (and I really dislike giving this recommendation), it would be worth to try with a fresh KNIME installation.
Fingers crossed that the -clean switch will fix this – please keep me posted here!
Thanks,
Philipp