[Discover the secrets of the Initiation Ritual of the Eulerian Circles Society.]
A chain Quest from the System appeared after the version update that was highlighted and pinned at the top of the Quest Menu.
To be honest, while the fact it was obviously a high-priority Quest designated by the System, what made Mattheus fixate on the Quest was the listed reward at the end.
[Reward: Taboo Key x1.]
[Final Reward: Restricted Access Removed. (Requires Taboo Key x3, Covenant of Pandora)]
When he had expanded the specifics of the final reward, he was redirected to a pop-up window of what looked like an End User Agreement. The "restricted access removed" was essentially an amendment and fixing a connectivity issue with the planet.
All the legalese and technical English he read basically proved several theories of the System that floated around in their previous world along with debunking others. It also created new questions.