VSCode: No CMAKE_CXX_COMPILER could be found. (proj created in Creator)

[FishBoneEK]

Trying to use Cursor on my Qt project.
The Qt extension is able to find the Qt versions installed, e.g. 6.10.2, kit selected as llvm-mingw of this version.
But then CMake reports No CMAKE_CXX_COMPILER could be found.
The project is created in Qt Creator.
Thanks!

P.S. Though I said Cursor but this is also reproducable in my VSC. Platform is Windows.
P.S.S. Just tried to create project from Qt extension on VSC (not cursor), not working neither.