[Issue] Encode / Decode : Running `chunk` and `knit` documents

We all Non-Malay (Non-Eunice and only wizard need Islamic Malay since the wizard Teo & Law don't understand Arabian language), it working fine since last week when set the Sys.setlocale("LC_ALL", "en_US.UTF-8"), used to mention only owner project affected but wonder why here the problem came again... Somebody take a look?