Full error message:
perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LANG = "en_IN" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory Package `locales' is not installed and no info is available.
First install the package as suggested:
apt-get install locales
Then, reconfigure and generate locales:
A menu will popup where you can select to generate all locales, and set default locale. I set en_GB as default