this is the sites which i have now
erp.fastgrp.net is working with all modules
while
vmail.fastgrp.net is not
frappe@erpnext:~/frappe-bench$ ls
apps archived_sites config env logs node_modules patches.txt Procfile sites
frappe@erpnext:~/frappe-bench$ cd sites
frappe@erpnext:~/frappe-bench/sites$ ls
apps.txt assets common_site_config.json currentsite.txt currentsite.txt.old erp.fastgrp.net languages.txt vmail.fastgrp.net
frappe@erpnext:~/frappe-bench/sites$