Make install cannot find "icon-96.png"

[fjavifabre]

After compiling in Ubuntu 20.04 (GCC-10) running make install gives the following error:

-- Install configuration: "Release"
-- Installing: /usr/local/bin/HDRView
-- Installing: /usr/share/applications/hdrview.desktop
-- Installing: /usr/share/icons/hicolor/1024x1024/apps/hdrview.png
-- Installing: /usr/share/icons/hicolor/512x512/apps/hdrview.png
-- Installing: /usr/share/icons/hicolor/256x256/apps/hdrview.png
-- Installing: /usr/share/icons/hicolor/128x128/apps/hdrview.png
CMake Error at cmake_install.cmake:125 (file):
  file INSTALL cannot find
  "/home/hdrview/resources/icon-96.png": No such file or
  directory.