i tried to install fusio api management but it come out error like this

/index.php/backend/token Failed to load resource: the server responded with a status of 404 (Not Found)

then i have set the fusio url in /public/fusio/index.htm to certain url then i comeout error localhost/fusio/public/index.php internal server error code 500

what should i do? can anyone share the correct installation guide because i am a real beginner to this