However, it works when I try it using File -> Reopen with Encoding -> UTF-8.
I also try to change the default Encoding system as: Tools -> Global Options -> code -> Savings -> Default Text Encoding to UTF-8 and still not working. The only solution is always using the File -> Reopen with Encoding -> UTF-8 path, even to open locally saved script files.
I think the problem happened during install the new R 4.2.0.