Qt The application was unable to start correctly (0xc000007b)

Am trying to compile project found at uconfig, I managed to compile the application successfully using 32bit version mingw, yet when I run the .exe I get this error The application was unable to start correctly (0xc000007b), I moved all the required DLLs required to exe path but still getting same error, on the other hand, the application starts in debug mode in Qt creator normally

After searching ... the reason was I had another verion x64 of Qt installed and /bin was added to system path. this resulted in conflict between DLLs generated from Qt and ones found in the System path