Apparently this is not a European mirror of the AI but (still?) only a landing page for the announcement of intent of an associated project. No content whatsoever can be browsed (yet).
https://web.archive.org/web/20230419191753/https://stichting...
Did nothing happen until recently? Even as of 2023 everything on the website was in the future tense. "It is the intention of SIA to...", "Funding will be provided..."