This last error is due to a mix of the anaconda and system libraries being found, which may lead to weird mixing, as the error message notes.
As this looks like an Ubuntu system, I’d strongly recommend installing Qt5 through the system package manager instead of those from anaconda (NB: there is a Conda-forge package of Geant4 available Geant4 :: Anaconda.org). This is also likely to have a more up-to-date version of Qt and allow the use of Qt53D.