ERROR on MacOS

[iPhilBln]

Hey. I run the qmake -spec macx-clang lbr2svg.pro command and it doesn't show any error messages. Only this information:

Project WARNING: Qt has only been tested with version 10.15 of the platform SDK, you're using 11.1.
Project WARNING: This is an unsupported configuration. You may experience build issues, and by using
Project WARNING: the 11.1 SDK you are opting in to new features that Qt has not been prepared for.
Project WARNING: Please downgrade the SDK you use to build your app to version 10.15, or configure
Project WARNING: with CONFIG+=sdk_no_version_check when running qmake to silence this warning.

Afterward I run the make command but it failed with this error message. I don't know how to handle this error. Maybe someone can help me.

../../fritzing-app/src/svg/../debugdialog.h:25:10: fatal error: 'QDialog' file not found
#include <QDialog>
         ^~~~~~~~~
1 error generated.
make: *** [svgfilesplitter.o] Error 1