File sharing problem - connection failed
I am for some reason unable to access files on a shared mac. Normally I just go to my finder window, select the shared mac, and login with the primary user's login and I can get everything through the network. I can tell the login is accurate because when I intentionally use the wrong password it declines me. Because when I login correctly it just says "Connection Failed".
The only variable that is new here from the past when all things worked, is I'm on a new network (via Airport express as a router), but both machines are connected and visible.
When I reverse this process, and attempt connection from the MacBook Pro to my Mac Mini, it works fine! Why would the connection fail in only one direction?
I considered that maybe its that the MacBook Pro is using Mojave (10.14) and this Mac Mini is on El Capitan (10.11), except that this didn't change recently and it worked just fine before.
Mac mini, 10.11