Qt5DocToolsConfig.cmake fails to find qdoc

CMake Error at C:/Qt/5.15.0/msvc2017_64/lib/cmake/Qt5DocTools/Qt5DocToolsConfig.cmake:9 (message):
  The package "Qt5DocTools" references the file

     "C:/Qt/5.15.0/msvc2017_64/bin/qdoc"

  but this file does not exist.  Possible reasons include:

  * The file was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and contained

     "C:/Qt/5.15.0/msvc2017_64/lib/cmake/Qt5DocTools/Qt5DocToolsConfig.cmake"

  but not all the files it references.

Call Stack (most recent call first):
  C:/Qt/5.15.0/msvc2017_64/lib/cmake/Qt5DocTools/Qt5DocToolsConfig.cmake:25 (_qt5_DocTools_check_file_exists)
  C:/Qt/5.15.0/msvc2017_64/lib/cmake/Qt5/Qt5Config.cmake:28 (find_package)
  cmake/QulDocTools.cmake:2 (find_package)
  doc/CMakeLists.txt:1 (include)

-- Configuring incomplete, errors occurred!