SQLSafe xp_ss_restore Could not retrieve version from SQL Server

I recently inherited a system which uses the backups of a production system to populate a test environment for devs.  They do a refresh every few months, and when they tried it a couple days ago, it failed.  I am not able to tell from the error message "Could not retrieve version from SQL Server" what is actually failing.

xp_ss_restore did not complete.  An error(0,1) was encountered.  Please check the parameters and their values. [v7.4.0.86]

SQLsafeCmd output:
——————
SQLsafe Backup and Recovery CLI Version 7.4.0.86 (x64)
Copyright (c) 2004-2014 Idera, Inc., All Rights Reserved.
<http://www.idera.com/>

Connecting to service on XXXXXXX …success.  (7.4.0.86)

RESTORE yyyyyy…FAILED.
Server instance: XXXXXXX , Database: yyyyyy
Could not retrieve version from SQL Server

— End of SQLsafeCmd output —

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