Shiny server encoding


I am having a problem related to encoding that seems specific to shiny server (RHEL 1.1.383). When displaying special characters (Right Single Quotation Mark, ASCII code 8217), shiny server shows a question mark. This problem is not present when I run the shiny app from rStudio Server (0.99.473). I am using shiny 1.0.5. The problem also is not present when the app is served from a previous version of shiny server. To note, the command, Encoding(text_to_display) in the console returns "unknown".

Any ideas?