I've just reacquainted myself with the SilverStripe CMS, it's been a few years since last time of use.
This time I had problems to install version 3.5.3 on my hosting provider, the install script stopped during the DB table setup.
Building database schema... POST /install.php Line 581 in /storage/content/41/<site_address>/public_html/framework/model/connect/DBSchemaManager.php
It took a while to find out that the versions 3.x does not run under PHP version 7.
Although there is a patch!
Have a look at: https://github.com/wernerkrauss/silverstripe3-php7
With the patch installation is working beautiful.
So, I'm putting this on the forum for the next in line that might have encounter the same issue.
Best of luck to you all!