Did you run the autodetection on the toolchain tab.
After making sure the correct compiler has been chosen, in your case this is very likely "GNU GCC Compiler".
If installing for the first time, the "result defaults" is also a good thing to try.
It erases the Compiler Customization and run autodetection.
NOTE: The above is going with the idea you are on Windows and download the version of CB with mingw in the file name.