Try downloading the installer again from a different mirror or the official developer's website. Technical Note for Developers
Therefore, “cannot import” means the runtime system tried to JIT‑compile or link a function that required constant expansion, but the expansion routine was missing, often because: runtime error at 1 0 cannot import expandconstant
Some users have reported the error when using custom shaders or visual scripting nodes. The engine’s intermediate representation fails to resolve expandconstant during ahead‑of‑time (AOT) compilation. Try downloading the installer again from a different