after install new multi site only frappe install erpnext not view
You have to install ERPNext on the new site separately. When you run
bench new-site <sitename> only frappe is installed.
After this, you need to run
bench -- site <sitename> install-app erpnext to install erpnext on the newly created site.
bench --site install-app erpnext
An error occurred while installing erpnext:
ERPNext can only be installed on a fresh site where the setup wizard is not completed.
You can reinstall this site (after saving your data) using: bench --site [sitename] reinstall
Yeah, as the error says, you can’t install erpnext after completing the setup wizard.
Reinstall the site, then install erpnext on top of Frappe. After that log in and complete the setup wizard.