Upgrade did not work and I'm not in good shape

Followed the durned directions for upgrade, and it has not worked. This is my third Omeka install that has not upgraded correctly.

When I get to last step, I am not automatically redirected to an upgrade page. I have a completely blank page on the admin page, and I have a completely blank page on the project page.

Tried to turn on error logging, but since the site does not appear to run, it is not surprising that no errors are being logged.

A white screen is usually caused by a fatal PHP-level error, which would be logged by PHP. The default PHP logging location on many servers is the Apache error log.