Lynx?
You can't be serious. Lynx is an ancient text-only browser. I'm surprised you got as far as you did!
The message you're seeing isn't surprising with a browser that old. The software looks for certain information from the browser to verify that you're really posting through the official form, and that you're not a spambot. Not specific to Lynx, but any browser that doesn't return all the required info (i.e., a browser built since 1998) will be locked out.