I need help. Problem I have is that I when I try to enable permalink to show my pages as www.abc.com/page/ it doesn’t work but works if I change the WordPress settings to link to exact page like www.abc.com/page/page.php I want to display pages in the former, more beautiful URL format

I have a typical LAMP setup on Ubuntu 18.04

This is what I did

1. Enabled mod_rewrite

2. My .htaccess file looks like this :

3- when i edit the value in /etc/apache2/apache2.conf from

Old

to

New

The website crashes whenever i change the above value ,

I also tried to re install my apache server and nothing seems to work .

Please advise