Same issue here. I started trying to log in about 30min ago. I can also type in chat, other FS members can see and respond. I submitted a support ticket after: clearing cache, restarting browser, trying different browsers, restarting computer.
I'm OP on EN Forum Bug Report
This bug is active for Google Chrome, Mozilla Firefox running on HTML5. This bug is active for Microsoft Edge, running on Flash. This bug is active on mobile platforms, I tried on an Android phone, another player on the EN thread reports this for iPhones as well