Error 10054 is not specific to Warframe, it's used system-wide and refers to a connection loss (generally forcibly closed by the remote host). It's generally due to an incorrect firewall configuration of sorts, blocking the connection from establishing. It's usually a certain modem or network topology or config that can cause it; like I stated prior, I had one specific modem that caused it for a few months myself. If you're leasing equipment from your ISP, you could get them to give you a