Error: /backend/index.php/guest/index was not found

[Ankit]

After installation of Mailwizz on our server, we are not able to open the installer page.
Getting Not Found Error: The requested URL /backend/index.php/guest/index was not found on this server after successfull installation of mailwizz.
Not able to open any link after installation.

Any idea, how to resolve this?

 

[twisted1919]

That one for your hosting company, it's not related to mailwizz in anyway, as you see in this case, PHP is not even executed.
So ask your hosting what's the deal. if this is your VPS, look inside the apache logs and see hints there.