Sometimes the inquiry learning apps developed by the University of Twente don’t run (you see nothing on your screen). This can have the cause that you have installed the Privacy Badger (https://www.eff.org/privacybadger) browser extension, so the Privacy Badger must allow content to be downloaded from the Go-Lab server in Twente.
Click on the Privacy Badger icon () to open the settings window:
The slider next to go-lab.gw.utwente.nl must be in the middle (yellow) or at the right (green). If the slider is at the left (red), all content from go-lab.gw.utwente.nl is blocked. As the result, the code for the inquiry apps cannot be loaded.