Hi,
I apologize if this is in the wrong place. I have scoured the threads here, and find similar situations, but not quite the same situation.

Clean install of 5.6.0.2 to the server. Site is in beta... Initially ran without a hitch. I tested it under Admin powers, and User powers. Both worked as it should in all aspects.

Yesterday evening when logging in, the login would throw us to:
Admin - /login
User - /forbidden_page

The user can select the 'back to home link' to edit but that page is freakin' them out a little.

We have:
Checked overrides: blocks/autonav, themes/crow-river-wellness -
Fails.

Reworked the login script; Fails.

Uninstalled and reinstalled the theme - fails.

Disabled Pretty URLS, Cleared Cache and re-enable P. Urls - Fail.

Redirected login to custom page via 'login destination' tool : fails (weirder yet it seems to be totally ignored)

We thought possibly the theme name might be interfering, but we have other themes with the same naming conventions, and they function fine.

We even disable the site_theme_paths.php to view as defaulted - still fails.

URL:http://63.143.38.66/~crwellne/

Any ideas short of deleting and starting over on this?

Thanks in advance!