I was working using a Wamp server installed on my computer and everything was working fine for my Wordpress site. But when I installed a plugin, the entire WP site is gone as it displays "Oops! That page can’t be found." 

Status:
My Wamp is green, and I can access phpmyadmin and see my database. But I can't establish a connection via localhost to the front or backend of Wordpress.
I've also checked my Apache error log and there isn't anything using port 80.

I've tried to use 
````
"define('WP_ALLOW_REPAIR', true);" 
````
on 'wp-config' but no luck. I m pretty new to this Wordpress development, so please do guide me through how to fix this. Thank you

Here is my ```.htaccess``` file
```
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wordpress/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wordpress/index.php [L]
</IfModule>
```