Comment # 13 on bug 1117502 from Eric McAlvin

I have uploaded a sample emacs config and vm config. The vm module is bundled
with the xemacs RPM that comes with openSUSE Leap 15.0.  

After savings these attached files as:

~/.emacs
~/.vm

Launch 'xemacs'.  To get into the VM module, go to menu drop down: Tools_
Internet --> Read Mail 1 (VM).  It will prompt you for your IMAP password.

For me, if I export LANG=en_US ; xemacs   , the warning no longer appears and
xemacs vm module works.  It displays the contents of the emails.