Error to compile geant4 after update ubuntu 18.04 to 20.04

Hi geant4 user ! I got error to compile my geant4 source code after update ubuntu 18.04 to ubuntu 20.04. someone can help me to fix it ?

You may need to recompile the main parts of geant4 if you have updated the OS version.

okay !
Thank for help !

You may also be missing needed packages such as QtCore etc. In general you should always recompile/reinstall after an upgrade as there’s no guarantee of binary compatibility or the same layout of system packages.

Okay! I tried to upgrade the Qtcore package.
Thank for your help.