https://portableapps.com/manuals/PortableApps.comLauncher/intro/quicksta... claims that "To use the PortableApps.com Launcher, you will need to download and install NSIS Portable (the Unicode variant)".
But NSIS Portable no longer has variants. There's only one program now.
So please remove that claim (in the offline version too).
Also see about whether it needs NSIS Portable at all.