SAP ASE installation error: Using locale name "C.UTF-8" defined in environment variable LANG

Error message:

The context allocation routine failed when it tried to load localization files!!

One or more following problems may caused the failure

Your sybase home directory is <DIRECTORYNAME>. Check the environment variable SYBASE if it is not the one you want!
Using locale name "C.UTF-8" defined in environment variable LANG
Locale name "C.UTF-8" doesn't exist in your /<SAP FOLDER>/locales/locales.dat file
An error occurred when attempting to allocate localization-related structures.

Solution:

<SAP FOLDER>$ export LANG=