qt/trafficgraphwidget.cpp:55:13: error: member access into incomplete type 'QPainterPath'
        path.moveTo(x, YMARGIN + h);
            ^
/usr/local/Cellar/qt/5.15.0/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
      ^
qt/trafficgraphwidget.cpp:59:17: error: member access into incomplete type 'QPainterPath'
            path.lineTo(x, y);
                ^
/usr/local/Cellar/qt/5.15.0/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
      ^
qt/trafficgraphwidget.cpp:61:13: error: member access into incomplete type 'QPainterPath'
        path.lineTo(x, YMARGIN + h);
            ^
/usr/local/Cellar/qt/5.15.0/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
      ^
qt/trafficgraphwidget.cpp:109:22: error: variable has incomplete type 'QPainterPath'
        QPainterPath p;
                     ^
/usr/local/Cellar/qt/5.15.0/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
      ^
qt/trafficgraphwidget.cpp:116:22: error: variable has incomplete type 'QPainterPath'
        QPainterPath p;
                     ^
/usr/local/Cellar/qt/5.15.0/lib/QtGui.framework/Headers/qmatrix.h:54:7: note: forward declaration of 'QPainterPath'
class QPainterPath;
      ^
5 errors generated.
make[2]: *** [qt/libbitcoinqt_a-trafficgraphwidget.o] Error 1
make[1]: *** [all-recursive] Error 1