Qt CreatorAny KF5 widget: No such file or directory

[Graloock]

I'm using Manjaro 20.0.2 on kernel 5.10, KDE Plasma 5.20.5. If I paste to form any KF5 widget, it shows on preview with no problem, but after I compile it says like this:

/home/graloock/Projects/build-Harmonika-Desktop-Debug/ui_modwindow.h:16: error: kkeysequencewidget.h: No such file or directory
In file included from ../Harmonika/modwindow.cpp:3:
./ui_modwindow.h:16:10: fatal error: kkeysequencewidget.h: No such file or directory
   16 | #include "kkeysequencewidget.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~

I tried to Google something like this, but not found any solution. Any ideas? I'll send more info if you need.

[Christian Ehrlicher]

So did you actually add the include paths for those headers?