I don't have the exact error but it came up while installing at about 40%. It recommended to verify the integrity of the files...but Phantom Liberty does not have "Options" after selecting language.

I have the latest version of the base game. It there another way to verify integrity?

You are sure you have all the required files?

Copy-paste from an earlier thread:
Phantom Liberty 2.1, 11 files, 38.5 GB:
setup_cyberpunk_2077_phantom_liberty_build_4984974change_6525662_0_(64bit)_(56123).exe
setup_cyberpunk_2077_phantom_liberty_build_4984974change_6525662_0_(64bit)_(56123)-1.bin
to
setup_cyberpunk_2077_phantom_liberty_build_4984974change_6525662_0_(64bit)_(56123)-10.bin

If you're missing one of the .bin-files, the installer will throw an error.

If it's stopping every time at the same file, I would recommend downloading that single .bin file again.