Had trouble getting this to work
I removed index.php string out of config.php
put . in front of htaccess file in root folder
but it did not work but I found this and it works
## Run InvoicePlane in a subfolder
## If you are using a subfolder please remove the hash in front of the line ‘#RewriteBase /subfolder’
## and replace ‘subfolder’ with the actual name of your folder, i.e. ‘RewriteBase /invoices’
<IfModule mod_rewrite.c>
RewriteEngine On
#RewriteBase /subfolder
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
#RewriteRule . /index.php [L]
RewriteRule .* index.php/$0 [PT,L]
## Remove the hash in front of the following two lines if you want to force HTTPS
#RewriteCond %{HTTPS} off
#RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R=301,L]
Redirect /setup http://localhost/
</IfModule>