CMAKE configure issue on Ubuntu for VTK 9

Environment: Ubuntu:20.04.2 LST
Compiler: G++ 9.3.0
CMAKE Version: 3.16.3 -
Generator - Unix MakeFIles
vtk version: 9

Error LOG: Could NOT find X11 (missing: Xt) CMake Error at CMake/vtkModule.cmake:4140 (message): Could not find the X11 external dependency. Call Stack (most recent call first): Rendering/OpenGL2/CMakeLists.txt:334 (vtk_module_find_package).

What is the compatible compiler/cmake version, and Generator or latest vtk 9? i have been trying to run cmake on various vtk version going from version 6.3-7-8 till 9.

Edited May 03, 2021 by Homersbm