Unable to install privacy extension

Hi all i am trying to install red field privacy nodes, however when i try to install, this errors pops up

Cannot complete the install because one or more required items could not be found.

Software being installed: Redfield Privacy Nodes 1.0.0.v201911040846 (se.redfield.arx.feature.feature.group 1.0.0.v201911040846)

Missing requirement: ARX Data Anonymization Node extension for KNIME Workbench 0.3.26 (se.redfield.arx 0.3.26) requires ‘osgi.bundle; org.knime.workbench.core [4.0.0,5.0.0)’ but it could not be found

Cannot satisfy dependency:

From: Redfield Privacy Nodes 1.0.0.v201911040846 (se.redfield.arx.feature.feature.group 1.0.0.v201911040846)

To: org.eclipse.equinox.p2.iu; se.redfield.arx [0.3.26,0.3.26]

Does anyone know how to fix this? Appreciate your advice.