Problem with SSH access

Yesterday, everything was working fine. Today, I cannot pull via SSH. Absolutely nothing has changed from then to now.

Input:
{{{
$ hg pull -v
}}}

Output:
{{

{\\ running ssh -C hg@bb "hg -R <repo name removed> serve --stdio"\\ remote: Connection closed by 75.101.141.151\\ abort: no suitable response from remote hg!\\ }}

}