Alliance auth failed to connect to Forums

Created by: 73udz

I have alliance auth running at the subdomain of auth.site.com and the forums running on forum.site.com

I have gone thru the steps under forum.site.com/install and set it all up, it is running with no issues. All tables populated in the database and it has successfully made the admin account for the forums.

When I go to auth.site.com/services/ and go to try to hit the checkbox to enable a forum account I direct me to auth.site.com/phpbb3/activate/ and gives me a Server Error 500 page.

You can directly connect to forum.site.com, but it appears alliance auth cannot reach it and make accounts.

All other services are performing properly. All services are running within the same Box.

I have the forums and auth setup on Nginx running thru two different site-enabled config files, I don't know if that matters or not.

All help is appreciated!

Nginx error Log:

2018/06/01 15:23:52 [error] 20352#20352: *1 rewrite or internal redirection cycle while internally redirecting to "/install/app.php", client: 0.0.0.0, server: forum.site.com, request: "GET /install/app.php/ HTTP/1.1", host: "forum.site.com"

Snip-its of my Alliance Auth Settings:

INSTALLED_APPS += [
#Corp Stats
'allianceauth.corputils',
#SRP
#'allianceauth.srp',
#Autogroup
'allianceauth.eveonline.autogroups',
#Optimer
'allianceauth.optimer',
#Permission Auditing
'allianceauth.permissions_tool',
#Discord
'allianceauth.services.modules.discord',
#phpbb Forums
'allianceauth.services.modules.phpbb3',
]

########################
# PHPBB3 Configuration #
########################
PHPBB3_URL = 'forum.site.com'
DATABASES['alliance_forum'] = {
    'ENGINE': 'django.db.backends.mysql',
    'NAME': 'alliance_forum',
    'USER': 'allianceserver',
    'PASSWORD': 'password',
    'HOST': '127.0.0.1',
    'PORT': '3306',
}