Error when trying to install the Thingworx extension Eclipse plugin "Could not find jarfile"

Hi,

When adding the repository for the extension Eclipse plugin I receive the error in the attached pictures.
From what I understand, there are jar files in the plugin zip.

What is going on?

I have tried the current and former thingworx specific versions of the plugin without success.

Look in the attached pictures for version of the IDE, as well as the error messages.

Kind Regards

Oskar Berntorp