I already change site URL and home with correct url in wp-options and how to refresh permalinks if I cannot open and login to wordpress dashboard ?

And for the main and staging yes it's have same content. How to add robots.txt file in staging ?

ok. lets worry about the robots file later. Check your wp-config.php file for correct DB details. What is the result of example.com/staging/wp-login.php? Is it redirecting to the main domain?

Yes in wp-config.php the DB details is correct. And, example.com/staging/wp-login.php yes it gives me redirecting to the main domain page not found.

ok try this one, open the index.php for your staging site (the one inside WordPress not in theme folder), find the line require( dirname( FILE ) . '/wp-blog-header.php' ); and change it to require( dirname( FILE ) . '/staging/wp-blog-header.php' ); Let me know the results.

If this doesn't work, try moving your staging instance from a subdirectory to subdomain. something like staging.example.com. This is a lot easy to setup.

I change like this require( dirname( __FILE__ ) . '/staging/wp-blog-header.php' ); but still gives redirect to main site page not found

I tried to use subdomain but it's give me domain not register

Would it be fine if we moved the instance on a subdomain

no. u will have to create one from cpanel. Do u have cpanel access?

Ya I create in cpanel but when I open it gives not register domain

It's very awkward sir

Hahahaha

does the not register message appear while creating or after creation?

No, when I create the subdomain that's looks smooth with no problems but when I hit the subdomain.example.com in browser it gives mercusuar.co.id it means the domain is not registered

thats weird

i will need to take a look myself

Ya it's weird

share your cpanel details it thats okay wid you.

That's the problem I cannot share my cpanel access because my boss not allowed me

oh.. thats okay. Also my desktop is really messed up or else i would have assisted you on teamviewer. Anyway, try to create a subdomain once more following these steps - inmotionhosting.com/support/edu/cpanel/cpanel-manage-domains/…

Hope this helps

Okay I will try it first

How could I contact you back if I need help in the future ?