When am typing the domain name its showing this error

We will be back soon.

Don’t panic. It’s not you, it’s us.
Most likely, our engineers are updating the code, and it should take a minute for the new code to load into memory.

Try refreshing after a minute or two.

Did you recently update?

yes its latest version only

Try this:

## cd ~/frappe-bench/
## bench migrate

@Sajeer_K Seems your site locked in maintenance mode.

bench --site site-name set-maintenance-mode off   
bench --site site-name migrate