You may open in new window (clicking empty space opens it in https://viewer.diagrams.net/ - Best Option), or navigate using top-left buttons. Zoom where needed. (May take a while to load.)
Web Log of All Outcomes of Mod Schemata: Use Menu (Right Hand Upper Corner) to Explore All Book Summaries, Concepts Maps, Informal Discussions, and Questions Yet Unanswered in Theory or Practice etc.