Simple FPGA serial communication not working
My best guess is that you forgot to load the .qsf file in the Quartus project so that the fitter does not really know what pins you are referring to. Check this, check also that your adapter is working short circuiting the tx and rx pins manually, check that the correct COM port is opened in RealTerm. Your settings look good, just keep in mind that they don't mind at all if you just make a short circuit, as long as you don't use flow control.

If none of the above helps please post the compiler/fitter full report.