OpenSSL version mismatch. Built against 90581f, you have 90602f
when you try to use SSH in 10.1. Stepwise has the solution in the form of a "SSHCleanup.command" shell script; click here to view the script's contents. To use it, copy and paste the text into a new text file and name it "ssh-cleanup.command". Save the file (in pure text format), then open a terminal and type sudo sh ssh-cleanup.command in the directory where you saved the file.
This should fix your SSH problems in 10.1. Thanks to Peter H. for finding both the error and the solution.

