EVERY PIECE OF SOFTWARE NEEDS TO HAVE AN ENTIRE COPY OF GOOGLE CHROME IN IT TO DISPLAY A BASIC USER INTERFACE, HAVING 10 SLIGHTLY DIFFERNET VERSIONS OF ELECTRON INSTALLED AND LOADED INTO MEMORY IS THE OPTIMAL SYSTEM SETUP
Ah, so it was that one! Unfortunate. Someone should probably tell them, although perhaps it's an upstream issue. Anyway Lean is really cool! There's a fun puzzle game people made with it here: https://adam.math.hhu.de/#/g/leanprover-community/nng4