11.1 is a very old version of the compiler. 16.0 Update 2 is the latest release BTW so 11.X is indeed old and I don't think there's official support as well for that version.
That said, there are two options you can try:
1) You can download the the config file "silent-11-1.cfg" that I've attached to this issue and try it out.
2) You can run the installer in the duplicate mode (./install.sh -duplicate ./cfg.txt) After the installation, the installer will create the cfg.txt
Hope the above helps.