is the issue the Qt version?

Author: eteran

.github/workflows/build.yaml

@@ -24,7 +24,7 @@ jobs:
       - name: Install Qt
         uses: jurplel/install-qt-action@v4
         with:
-          version: "5.12.8"
+          version: "5.15.13"
 
       - name: Configure CMake
         # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.