wordpress site home page showing error message and opening in other address

my site address is
https://www.gangaspintex.com

home page can be accessed on the address of
https://www.gangaspintex.com/index.php/home

i have installed the wordpres first locally on my computer using wamp and was smooth run. i made a website using it. its 4.4.1 installation.
when i tried to install it on live server its showing error of
redirect loop
without database as it open install.php page.
after uploading the database the wordpress can be accessed. but when i changed the site address and word press address in settings>>general from localhost/wordpress to https://www.gangaspintex.com it didn’t show my site instead an 404 error message is displayed.

Not Found
The requested document was not found on this server.

Web Server at gangaspintex.com
Not PLESK

but when i accessed https://www.gangaspintex.com/index.php/home it shows the home page of site and all other pages can be also accessed through that page or from pages in wordpress.
i had already tried to reset the permalinks by changing and saving them and then again changing them to post name.
Also when in wordpress i enter the customizer it shows the page with following message

Not Found
Sorry, but the page you were trying to view does not exist.
It looks like this was the result of either:

a mistyped address
an out-of-date link

Search

Please help!

You also need to change the site address in wp-config file. Hope you have done that too

@rohan Mehta
i am new to wordpress where to change the site address in wp- config file i have changed the db name only in wp-config.php file

Sorry this setting is only for multisite WP
define(‘DOMAIN_CURRENT_SITE’, ”);

If you are not on multisite then it may not be an issue

@rohan Mehta
I am not using multisite

I am also facing the same problem. I have installed the wordpress 4.7 manually.Now my website is not open and displaying error –
Not Found
The requested document was not found on this server.
Web Server at carastore4u.com
My homepage can be accessed on the address- https://www.carastore4u.com/index.php
When I accessed, it shows the home page and all other pages can be accessed through this page. I had tried to set the permalink but not worked. My permalinks are set on Day and Name. I also change the site and home url in database from https://carastore4u.com/wordpress to https://www.carastore4u.com (In dashboard > setting > general site url is https://www.carastore4u.com.
Please help me to solve it.