An error occurred while collecting items to be installed
session context was:(profile=KNIMEProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,org.knime.expressions.base,4.6.0.v202205241001
No repository found containing: osgi.bundle,org.knime.expressions.filehandling,4.6.0.v202202251627
No repository found containing: org.eclipse.update.feature,org.knime.features.expressions,4.6.0.v202205241952
Unfortunately, my colleagues and I could not reproduce your error. We have tested this particular scenario and everything works as expected. Maybe you could give us more details.
Which KNIME Analytics Platform Version are you using?
Does this also occur with other extensions?
Does this error also occur, if you install the extension manually? (File > Install KNIME Extensions > Search: KNIME Expressions)