Submitting unrecognised file: Connection to the server could not be established

Anyone else having difficulties submitting Unrecognized Files via CIS 8.1.0.4426?
For the last month I’ve been receiving “a connection to the server could not be established”.
The error comes up after waiting around 1-2 minutes.

I changed the all caps part of the title to normal case. Eric

Hi, I sent the file without problems, you submitting file from menu Advanced Tasks - Submit Files or?