Error when compiling

I’m very sorry for trouble.
When compiling OpenMC, I have this error:
Initializing/Updating FoX XML submodule…
CMake Error at CMakeLists.txt:172 (add_subdirectory):
The source directory

/home/hung/openmc-develop/src/xml/fox

does not contain a CMakeLists.txt file.

Can anyone help?
Thank!

From the base directory of your local copy of openmc, try running the following commands:

git submodule init
git submodule update

Best,
Paul