export LC_CTYPE=en_US.UTF-8 on the Linux shell would solve the issue

To fix this error message you have to set your current locale appropriately: 

Execute

<code>

shell> export LC_CTYPE=en_US.UTF-8

</code>

on the shell and the problem would be solved. 

<code>

shell> locale
LANG=
LC_COLLATE="C"
LC_CTYPE="en_US.UTF-8"
LC_MESSAGES="C"
LC_MONETARY="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_ALL="C/en_US.UTF-8/C/C/C/C"

</code>