Every time I try to install the Jagex Launcher I get this message: Error Failed to access remote metafile. The other log in doesn't work either, Really don't know what to do
Have you tried disabling your anti-virus (not something I'd usually suggest) but maybe that is causing it? You could try the Runescape Discord servers, people might know more in there.
Bob says:
A bank PIN will keep your items secure.
Always check the second trade screen.
Never trade in the Wilderness!
Keep your computer keylogger-free and virus scanned.