It still looks like your using jdk 13, maybe running with Java 8 compatibility? I’m not sure what JavaSE-1.8(jdk-13.0.1) actually means.
It looks like KNIME is trying to load with the VM option of ‘UnsyncloadClass’ which looks to have been deprecated and then removed by Java 13.
I’m not particularly familiar with this end of KNIME development but the error does seem to be implying you’re using an incompatible Java VM.
You could try downloading Adopt OpenJDK which I believe is the version KNIME deploys with:
Select for Java 8 and Hotspot.
Once installed/downloaded you should be able to add this as an environment from eclipse:
Window > Preferences > Java > Installed JREs
Then add the AdoptOpenJDK one following the dialog.
Hope it works!
Cheers
Sam