Error After upgrade to Cloudmin 9.0

When I select 'List Managed Systems' in Cloudmin 9.0 I get the following error:

HTTP/1.0 500 Perl execution failed Server: MiniServ/1.794 Date: Mon, 16 May 2016 07:02:04 GMT Content-type: text/html; Charset=iso-8859-1 Connection: close Error - Perl execution failed

Undefined subroutine &server_manager::can_down_status called at /usr/libexec/webmin/server-manager/index.cgi line 176.

It was fine before the upgrade (from 8.4)

Suggestions?