It looks like erpnext app isn’t installed. Check by running the below command in the terminal. It will show the installed apps.
bench list-apps
I followed the below sequence of steps to restore backup.
- Install fresh erpnext and frappe using easy install script. You can follow the manual method also.
- Complete the setup wizard on the new installation.
- Restore the data from the backup using bench restore command.
Refer these links also.