well if you are dong a fresh install then you should follow the docs at:
https://www.ubbcentral.com/doc_install.php

And not rely on the installer to warn you about permissions.
I think you are doing this the hard way.

BTW,
I now see a generic database error.
Which usually means that the database path,user name and or password is not correct.

Blue Man Group
There is no such thing as stupid questions. Just stupid answers