[SOLVED] No help files in KDE Help Center.

It would appear that my computer has the folder listings for kcontrol and for the local applications, but none of the files. To put it another way: In the KDE Help Center, I see a list of topics, including Application Manuals and Control Center Modules. Clicking either of those names gives me a list of topics. Clicking any of those topics reports "File or folder xxx does not exist." and "There is no documentation available for yyy." xxx may be, for example, help:/kcontrol/ebrowsing.index and yyy being /kcontrol/ebrowsing.index.
Under those two selections, every file is missing. Did I accidentally uninstall a package that I needed? What package was it?
Under those two selections, every file is missing. Did I accidentally uninstall a package that I needed? What package was it?