FTP IIS WebGL Emscripten

Hi all, I'm trying to get data using FTP and IIS. However, I receive an error message on localhost at the end of the game: Uncaught abort("To use dlopen, you need to use Emscripten's linking support, see https://github.com/kripken/emscripten/wiki/Linking") at Error How can I fix it? Thank you