When you can't through you go around. I don't know how to get the keyboard working but I know how to google workaround: on chromium 57 you can install input tools extension. So platform is from facebook and keyboard is owned by google. Not to type the most secret stuff. But with input tools you can change easy with whatever language characters. Just typed a message on the fly. Debbie stays open behind and not giving headache to use whatsapp.