Building of O2Physics fails at XRootD@v5.5.0 on Ubuntu 18.04

Dear Experts,

I encounter errors when trying to build O2Physics for the XRootD@v5.5.0 package, my OS is Ubuntu 18.04 LTS. I followed closely the instructions and did not encounter any problems while installing the prerequisites.

Here an excerpt of the log file:
CMake Error at /home/max/alice/sw/ubuntu1804_x86-64/CMake/v3.23.1-local1/share/cmake-3.23/Modules/FindPkgConfig.cmake:603 (message):
A required package was not found
Call Stack (most recent call first):
/home/max/alice/sw/ubuntu1804_x86-64/CMake/v3.23.1-local1/share/cmake-3.23/Modules/FindPkgConfig.cmake:825 (_pkg_check_modules_internal)
cmake/XRootDFindLibs.cmake:127 (pkg_check_modules)
CMakeLists.txt:31 (include)

The full log can be taken from:

Thank you in advance & best,