It appears you are trying to install the Euclid plugin, not the OpenStudio plugin. You can find a link to the latest SketchUp plugin here: https://openstudiocoalition.org/

If you are trying to install previous versions, you can find them here or here: https://github.com/NREL/OpenStudio/releases/tag/v2.9.1 https://github.com/NREL/OpenStudio/releases

It appears you are trying to install the Euclid plugin, not the OpenStudio plugin. You can find a link to the latest SketchUp plugin here: https://openstudiocoalition.org/

If you are trying to install previous versions, versions of the plugin, you can find them here or here: https://github.com/NREL/OpenStudio/releases/tag/v2.9.1 https://github.com/NREL/OpenStudio/releases