OpenCV makefile doesn't generate exectuable - c++

Question

I'm new to C++ and I'm trying to recreate the openCV tutorial with Cmake https://docs.opencv.org/master/db/df5/tutorial_linux_gcc_cmake.html
I downloaded the .exe for windows, built the sources with cmake via
cmake.exe -G "MinGW Makefiles"
Then, I tried to use the make command in the project folder with the debug flag. I received this output:
GNU Make 4.2.1
Built for i686-pc-msys
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Reading makefiles...
Reading makefile 'Makefile'...
Updating makefiles....
Considering target file 'Makefile'.
Looking for an implicit rule for 'Makefile'.
No implicit rule found for 'Makefile'.
Finished prerequisites of target file 'Makefile'.
No need to remake target 'Makefile'.
Updating goal targets....
Considering target file 'default_target'.
File 'default_target' does not exist.
Considering target file 'all'.
File 'all' does not exist.
Considering target file 'cmake_check_build_system'.
File 'cmake_check_build_system' does not exist.
Finished prerequisites of target file 'cmake_check_build_system'.
Must remake target 'cmake_check_build_system'.
Putting child 0x2004f248 (cmake_check_build_system) PID 22640 on the chain.
Live child 0x2004f248 (cmake_check_build_system) PID 22640
Microsoft Windows [Version 10.0.18362.836]
(c) 2019 Microsoft Corporation. All rights reserved.
I don't quite understand the output and googling for this didn't prove to be helpful. Since I don't have an executable file at the end (as mentioned in the tutorial), there seems to be some problem. What am I missing?
The CMakeLists.txt:
cmake_minimum_required(VERSION 2.8)
project( DisplayImage )
set(OpenCV_DIR "C:/Users/XXX/opencv/opencv")
find_package( OpenCV REQUIRED )
include_directories( ${OpenCV_INCLUDE_DIRS} )
add_executable( DisplayImage DisplayImage.cpp )
target_link_libraries( DisplayImage ${OpenCV_LIBS} )
CMake output:
cmake.exe -G "MinGW Makefiles"
CMake Warning:
No source or binary directory provided. Both will be assumed to be the
same as the current working directory, but note that this warning will
become a fatal error in future CMake releases.
-- The C compiler identification is GNU 4.9.3
-- The CXX compiler identification is GNU 4.9.3
-- Check for working C compiler: C:/Rtools/mingw_64/bin/gcc.exe
-- Check for working C compiler: C:/Rtools/mingw_64/bin/gcc.exe - works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: C:/Rtools/mingw_64/bin/g++.exe
-- Check for working CXX compiler: C:/Rtools/mingw_64/bin/g++.exe - works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found OpenCV: C:/Users/XXX/opencv/opencv (found version "4.3.0")
-- Configuring done
-- Generating done
-- Build files have been written to: C:/Users/XXX/Documents/C++
make output (minGW-32)
mingw32-make.exe VERBOSE=1
"C:\Program Files\CMake\bin\cmake.exe" -SC:\Users\XXX\Documents\C++ -BC:\Users\XXX\Documents\C++ --check-build-system CMakeFiles\Makefile.cmake 0
"C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_start C:\Users\XXX\Documents\C++\CMakeFiles C:\Users\XXX\Documents\C++\CMakeFiles\progress.marks
mingw32-make.exe -f CMakeFiles\Makefile2 all
mingw32-make.exe[1]: Entering directory 'C:/Users/XXX/Documents/C++'
mingw32-make.exe -f CMakeFiles\DisplayImage.dir\build.make CMakeFiles/DisplayImage.dir/depend
mingw32-make.exe[2]: Entering directory 'C:/Users/XXX/Documents/C++'
"C:\Program Files\CMake\bin\cmake.exe" -E cmake_depends "MinGW Makefiles" C:\Users\XXX\Documents\C++ C:\Users\XXX\Documents\C++ C:\Users\XXX\Documents\C++ C:\Users\XXX\Documents\C++ C:\Users\XXX\Documents\C++\CMakeFiles\DisplayImage.dir\DependInfo.cmake --color=
mingw32-make.exe[2]: Leaving directory 'C:/Users/XXX/Documents/C++'
mingw32-make.exe -f CMakeFiles\DisplayImage.dir\build.make CMakeFiles/DisplayImage.dir/build
mingw32-make.exe[2]: Entering directory 'C:/Users/XXX/Documents/C++'
mingw32-make.exe[2]: *** No rule to make target 'C:/Users/XXX/opencv_mingw/sources/build_mingw/lib/libopencv_dnn430.dll.a', needed by 'DisplayImage.exe'. Stop.
mingw32-make.exe[2]: Leaving directory 'C:/Users/XXX/Documents/C++'
CMakeFiles\Makefile2:94: recipe for target 'CMakeFiles/DisplayImage.dir/all' failed
mingw32-make.exe[1]: *** [CMakeFiles/DisplayImage.dir/all] Error 2
mingw32-make.exe[1]: Leaving directory 'C:/Users/XXX/Documents/C++'
makefile:102: recipe for target 'all' failed
mingw32-make.exe: *** [all] Error 2