When installing into PostreSQL it's important that your database name does not contain uppercase characters.
If you choose a name with upper case, the database will actual create, but then later cannot be connected to, to run the update queries.

Please ensure your databasename only has lower case.
E.g.

Yellowfin7 - BAD
yellowfin7 - GOOD


If you do run into any installation issues, please email support@yellowfin.bi with the relevant 'YellowfinInstallLog' located within the Yellowfin folder and any extra information you can provide.

Regards,
David