500 Internal Server Error – Jetpack Authorization

Hi all. OK, I’ve got a doozy here…

I’m getting the 500 Internal Server Error only when I try to log in to the admin page and access the dashboard. The site itself is up and running. This happened after I hit the button to “authorize” (I think that is what it said on the jetpack page of the dashboard). Jetpack was installed and running fine, but then I hit the button on the big green splash screen that shows up in the dashboard.

So, here is what I have done so far to fix it…

1. Logged in via FTP and renamed the plugin folder. Didn’t work.
2. Added a php.ini file to increase php memory. Didn’t work.
3. Changed the wp-options table, active-plugins to a:0:{} – Didn’t work.

I am at a loss how to fix it. Any help would be appreciated!