404 Page Not Found for yggdrasil

[neoarksoftware]

I have taken clone at path /var/www/html/ So code at my local laptop become /var/www/html/yggdrasil/
I am using ubuntu-16.04 (desktop version) and I have installed php5.6 at path /etc/php/5.6/

I am following document https://github.com/tottaz/yggdrasil/wiki/Installation and I have tried http://localhost/yggdrasil
and
http://localhost/yggdrasil/admin/users/login
and also
http://localhost/yggdrasil/index.php/admin/users/login
All 3 links generating error "404 Page Not Found"

I also have tried by rename .htaccess-install to .htaccess. It is generating error,

"Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at webmaster@localhost to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log"

I searched more more and observed that Content-Type in .htaccess file was used on basis of old apache version. I replaced .htaccess code

FilterDeclare COMPRESS
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/html
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/css
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/plain
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/x-component
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/javascript
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/json
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/xhtml+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/rss+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/atom+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/vnd.ms-fontobject
FilterProvider COMPRESS DEFLATE resp=Content-Type $image/svg+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/x-font-ttf
FilterProvider COMPRESS DEFLATE resp=Content-Type $font/opentype
FilterChain COMPRESS
FilterProtocol COMPRESS DEFLATE change=yes;byteranges=no

with the below code

<IfVersion < 2.4.4>

FilterDeclare COMPRESS
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/html
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/css
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/plain
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/x-component
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/javascript
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/json
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/xhtml+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/rss+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/atom+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/vnd.ms-fontobject
FilterProvider COMPRESS DEFLATE resp=Content-Type $image/svg+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/x-font-ttf
FilterProvider COMPRESS DEFLATE resp=Content-Type $font/opentype
FilterChain COMPRESS
FilterProtocol COMPRESS DEFLATE change=yes;byteranges=no

<IfVersion >= 2.4.4>

FilterDeclare COMPRESS
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'text/html'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'text/css'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'text/plain'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'text/xml'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'text/x-component'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'application/javascript'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'application/json'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'application/xml'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'application/xhtml+xml'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'application/rss+xml'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'application/atom+xml'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'application/vnd.ms-fontobject'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'image/svg+xml'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'image/x-icon'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'application/x-font-ttf'"
FilterProvider COMPRESS DEFLATE "%{Content_Type} = 'font/opentype'"
FilterChain COMPRESS
FilterProtocol COMPRESS DEFLATE change=yes;byteranges=no

By this way, ## Internal Server Error has resolved.
I am expecting that installer inside /var/www/html/yggdrasil/ should execute as use any of the below the below URLs
The error which is I am still facing is that all 3 below URLs are generating ## error "404 Page Not Found"
http://localhost/yggdrasil
and
http://localhost/yggdrasil/admin/users/login
and also
http://localhost/yggdrasil/index.php/admin/users/login

I also have reviewed log at path /var/www/html/yggdrasil/installer/log-2018-04-13.php. It is showing errors something like:

ERROR - 2018-04-13 04:40:29 --> 404 Page Not Found: /index
ERROR - 2018-04-13 04:50:22 --> 404 Page Not Found: Admin/users
ERROR - 2018-04-13 04:50:45 --> 404 Page Not Found: Admin/index.php
ERROR - 2018-04-13 04:51:55 --> 404 Page Not Found: Admin/index.php
ERROR - 2018-04-13 05:40:50 --> 404 Page Not Found: /index

Please suggest. Thanks in advance.