Why qt project can throw errors like undefined reference to `__imp_ Py_Initialize' and so on?

I want to add python functions in C++ code.
The project is written using qt.

In Mask.pro I have:

...
INCLUDEPATH += "D:/workplace/Python/include"
LIBS += -L"D:/workplace/Python/libs"
...

In main.cpp I have:

#pragma push_macro("slots")
#undef slots
#include <Python.h>
#pragma pop_macro("slots")
...
PyObject *pName, *pModule, *pFunc;
PyObject *pArgs, *pValue;

Py_Initialize();
pName = PyUnicode_DecodeFSDefault("Morpho");

pModule = PyImport_Import(pName);
pFunc = PyObject_GetAttrString(pModule, 0);

Py_XDECREF(pFunc);
Py_DECREF(pModule);
...

Errors while compiling:

D:workplacePythonincludeobject.h:500: ошибка: undefined reference to `_imp___Py_Dealloc'
debug/main.o: In function `Py_DECREF':
D:/workplace/Python/include/object.h:500: undefined reference to `_imp___Py_Dealloc'
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug..Maskmain.cpp:99: ошибка: undefined reference to `_imp__Py_Initialize'
debug/main.o: In function `Z5qMainiPPc':
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug/../Mask/main.cpp:99: undefined reference to `_imp__Py_Initialize'
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug..Maskmain.cpp:100: ошибка: undefined reference to `_imp__PyUnicode_DecodeFSDefault'
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug..Maskmain.cpp:102: ошибка: undefined reference to `_imp__PyImport_Import'
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug..Maskmain.cpp:103: ошибка: undefined reference to `_imp__PyObject_GetAttrString'

I just can’t find what I am doing wrong or what I even could forget about.

---

Whole .pro file:

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += 
    QMTIFF.cpp 
    main.cpp 
    mainwindow.cpp 
    processingBlock.cpp

HEADERS += 
    QMTIFF.h 
    mainwindow.h 
    processingBlock.h

FORMS += 
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

DISTFILES += 
    Morpho.py

LIBS += -L"D:/workplace/Python/libs" -lpython310

INCLUDEPATH += "D:/workplace/Python/include"
DEPENDPATH += "D:/workplace/Python/include"

LIBS += -L"D:/Qt/Qt5.15.2/5.15.2/Src/qtimageformats/src/3rdparty/libtiff/libtiff" -ltiff

INCLUDEPATH += "D:/Qt/Qt5.15.2/5.15.2/Src/qtimageformats/src/3rdparty/libtiff/libtiff"
DEPENDPATH += "D:/Qt/Qt5.15.2/5.15.2/Src/qtimageformats/src/3rdparty/libtiff/libtiff"

All errors and warnings:

C:ProjectsCprojectQTMaskMaskQMTIFF.cpp:103: предупреждение: comparison between signed and unsigned integer expressions [-Wsign-compare]
..MaskQMTIFF.cpp: In constructor 'QMTIFF::QMTIFF(QString)':
..MaskQMTIFF.cpp:103:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     } while (n < NOfPages);
          ~~^~~~~~~~~~
C:ProjectsCprojectQTMaskMaskQMTIFF.cpp:53: предупреждение: unused parameter 'test' [-Wunused-parameter]
..MaskQMTIFF.cpp:53:24: warning: unused parameter 'test' [-Wunused-parameter]
 QMTIFF::QMTIFF(QString test)
                        ^~~~
C:ProjectsCprojectQTMaskMaskmain.cpp:17: предупреждение: unused variable 'Num' [-Wunused-variable]
..Maskmain.cpp: In function 'int qMain(int, char**)':
..Maskmain.cpp:17:18: warning: unused variable 'Num' [-Wunused-variable]
     unsigned int Num = 1190;
                  ^~~
C:ProjectsCprojectQTMaskMaskmain.cpp:25: предупреждение: unused variable 'from' [-Wunused-variable]
..Maskmain.cpp:25:9: warning: unused variable 'from' [-Wunused-variable]
     int from = 1001;
         ^~~~
C:ProjectsCprojectQTMaskMaskmain.cpp:26: предупреждение: unused variable 'to' [-Wunused-variable]
..Maskmain.cpp:26:9: warning: unused variable 'to' [-Wunused-variable]
     int to  =  1190;
         ^~
C:ProjectsCprojectQTMaskMaskmain.cpp:96: предупреждение: unused variable 'pArgs' [-Wunused-variable]
..Maskmain.cpp:96:15: warning: unused variable 'pArgs' [-Wunused-variable]
     PyObject *pArgs, *pValue;
               ^~~~~
C:ProjectsCprojectQTMaskMaskmain.cpp:96: предупреждение: unused variable 'pValue' [-Wunused-variable]
..Maskmain.cpp:96:23: warning: unused variable 'pValue' [-Wunused-variable]
     PyObject *pArgs, *pValue;
                       ^~~~~~
D:workplacePythonincludeobject.h:500: ошибка: undefined reference to `_imp___Py_Dealloc'
debug/main.o: In function `Py_DECREF':
D:/workplace/Python/include/object.h:500: undefined reference to `_imp___Py_Dealloc'
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug..Maskmain.cpp:98: ошибка: undefined reference to `_imp__Py_Initialize'
debug/main.o: In function `Z5qMainiPPc':
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug/../Mask/main.cpp:98: undefined reference to `_imp__Py_Initialize'
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug..Maskmain.cpp:99: error: undefined reference to `_imp__PyUnicode_DecodeFSDefault'
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug..Maskmain.cpp:101: error: undefined reference to `_imp__PyImport_Import'
C:ProjectsCprojectQTMaskbuild-Mask-Desktop-Debug..Maskmain.cpp:102: ошибка: undefined reference to `_imp__PyObject_GetAttrString'
:-1: error: collect2.exe: error: ld returned 1 exit status