Because there is no way how to remove dependency on the libxcb-xinerama in Qt5 (and Qt6 is relased only two days), we added a warning message to the application for cases when this library is missing.
WARNING: Library libxcb-xinerama.so.0 is missing on your system. Please install it by using 'sudo apt-get install libxcb-xinerama0'
Hope this help others in case of this issue.