bug report - cannot copy ssl cert

Operating system CentOS Linux 6.8 Time on system Thursday, January 5, 2017 6:48 AM Kernel and CPU Linux 2.6.32-573.el6.x86_64 on x86_64

Webmin version 1.830 Virtualmin version 5.05

Server Configuration->Manage SSL Cert

Click 'Copy to Webmin'

produces this output: Copying certificate and key to /etc/usermin .. .. done

Configuring Usermin to use them .. .. done

which should be the output for 'Copy to Usermin' (which has already been clicked and worked correctly)