Expired Certificate and Dropped Passwords?

So myself and my coworker have inherited a system that is running on a bunch of Digital Ocean boxes and is managed by Rancher. All has been well and good while we learn how to use Rancher.

As of 3 days ago, however, we are getting privacy errors saying that the https certificate on the server used for logging into Rancher has expired and NONE of our passwords are working. There’s no option for recovering the password either.

We’re basically at a loss as to where to go from here, just looking for pointers.