Installing NextCloud via SiteGround

I’m a total newbie sorry and try to install NextCloud to my hosting provider.
I have tried to use the webinstaller:

The Web Installer is the easiest way to install Nextcloud on a web space. It checks the dependencies, downloads Nextcloud from the official server, unpacks it with the right permissions and the right user account. Finally, you will be redirected to the Nextcloud installer.

  1. Right-click here and save the file to your computer
  2. Upload setup-nextcloud.php to your web space
  3. Point your web browser to setup-nextcloud.php on your webspace
  4. Follow the instructions and configure Nextcloud
  5. Login to your newly created Nextcloud instance

However if I click on it says “Site could not be found”
Siteground does not have cPanel it sate SiteTools none of which seem to provide a wizard for NextCloud.

To add they have told me there platform meets the minimum requirements

Any tips?

i am not sure that siteground allows a web hosting which is strong enough for nextcloud.
i have tested quite a time ago and it was not usable(toooooo slooow)

for an easy installation maybe this is useful for you