You tried going to https://studiolab.ide.tudelft.nl/studiolab/persuasivegamedesign/studiolab/persuasivegamedesign/2019/11/25/fostering-social-interactions-in-ethnically-diverse-neighbourhoods-through-mobile-game-challenges/onet.pl
, and it doesn't exist. All is not lost! You can search for what you're looking for.