Failed to Move Virtual Server

When I did:

Server Configuration > Move Virtual Server

for a top-level server and moved it to be a sub-server of another domain, it partially completed and then issued the message:

Failed to move virtual server : Missing file to open at virtualmin_awstats::/usr/libexec/webmin/web-lib-funcs.pl line 2022

I

Status: 
Closed (fixed)