The system cannot find the valid RAP license file. Double-check that:
MultiMAN is a powerful backup manager and file explorer for jailbroken PS3s. It can also be used to install PKG files. Place the PKG files on your USB drive, in a packages folder like before. Then, launch MultiMAN, navigate to the file manager, find your USB drive and the packages folder, and you'll see an option to "Install PKG" or "Install All PKGs". jet set radio ps3 pkg install
The Ultimate Guide to Installing Jet Set Radio on PS3 via PKG The system cannot find the valid RAP license file