At this moment, Easy Install hangs. The workaround is to install with option --without-erpnext, and continue with
bench get-app erpnext
bench --site my.example.com install-app erpnext
This gives an error
Module import failed for Process Statement Of Accounts (erpnext.accounts.doctype.process_statement_of_accounts.process_statement_of_accounts Error: cannot import name 'format_date' from 'frappe.utils' (/home/erpfrappe/frappe-bench/apps/frappe/frappe/utils/__init__.py))
checking frappe/frappe/utils/data.py file of frappe v12.10.2 does not have format_date. Instead, it has formatdate.
I submitted a bug fix and I was informed that data.py file has been updated with format_date, with formatdate = format_date to maintain backward compatibility. I checked, and yes, the new version has fromat_date.
The thing is, the default install of frappe is v12.10.2 which does not have format_date.
Please bump up frappe to the version containing fromat_date.