Last I heard, the easy install script was no-longer supported (see this thread).
From the error text you pasted, it’s impossible to diagnose or provide advice.
For better or worse, my impression is the maintainers are encouraging everyone to:
- Install via Docker.
- Rent cloud space from an ERPNext service provider.
Manual installation will always be an option. Speaking from personal experience, it works great once you’ve mastered the process. But getting there is a very challenging journey. Many people don’t have the time to commit to such a thing.
Perhaps someday another installer will appear. (I once had plans for building such a thing, but ran out of time/budget.)