Yes. It is not a critical problem for site functionality, as this is site does not host financial transactions. But it moves encryption security for e.g. setting up a new account to "Trust me Bro" rather than guaranteed by a verifiable authority. The standard for hosting any login site is verified SSL. Firefox immediately put up a warning page that it cannot guarantee the site hasn't been hijacked, and average internet users would pretty much ***ume the site had been hacked or something, with a warning like that.
It's not happening yet, but with an expired certificate, search engines will gradually de-rank Typeaccord from results, so people looking for answers will less and less find this site.