I did not change a single thing yet and all branches are up to date. All I did is adding the org.eclipse.smarthome.ui.paper package to my run configuration in eclipse. As soon as I do this, the Paper UI is no longer working and I get this error when trying to access it instead:
Am I missing a Step that needs to be taken to edit the UI, or does anyone know what could be going wrong?
Thank you for your replies, but sadly both suggestions did not work :S
I also tried removing the path from the run configuration and using the npm install again, but as expected, the UI works again and my changes are not present in the UI.