CMake failed due to wrong path to the MinGW compiler

I just updated to the latest version of Qt with the maintenance tool, and suddenly none of the CMake projects are working. When trying to build an exercise for university, I get the following message (computer is in French).

:-1: erreur : Generator: execution of make failed. Make command was: "nmake" "/nologo" "cmTC_29b7d\fast"CMake Error at D:/CMake/share/cmake-3.13/Modules/CMakeTestCXXCompiler.cmake:45 (message): The C++ compiler "C:/Qt/Tools/mingw810_32/bin/g++.exe" is not able to compile a simple test program. It fails with the following output: Change Dir: C:/Users/Cyril Albrecht/AppData/Local/Temp/QtCreator-wZEITo/qtc-cmake-BxrqcIrX/CMakeFiles/CMakeTmp Run Build Command:"nmake" "/nologo" "cmTC_29b7d\fast" Le fichier spécifié est introuvable Generator: execution of make failed. Make command was: "nmake" "/nologo" "cmTC_29b7d\fast" CMake will not be able to correctly generate this project.Call Stack (most recent call first): CMakeLists.txt:2 (project)

The error seems to be that the repository mingw810_32 does not exist, but there is a mingw81_32 at this location. I guess the problem comes from there.

I have no idea how to fix this issue on my own, if it is even possible.