error on sub manager

[marinelife]

When I click subscription manager in the admin area I get the following
by x00x_BOT

Linux host.XXXX.com 2.6.32-042stab078.28 #1 SMP Mon Jul 8 10:17:22 MSK 2013 x86_64
Then the option to upload a file.

If I turn off all plugins in the config file it fixes the issue. but when disabling them one by one it does not. How do I figure out which plugin is causing the issue?

Plugins are as follows:

vBulletin 4.2.2
BannedWords 1.2.1 With using "BannedWords" plugin, you can ban/deny some words/links(or their parts) from using in new posts/pm's. VB Plugin by LordOfWAR.

Country Moderations 3.0 Moderate New Users From Certain Countries

e360 Holiday 2.0.1 e360 Holiday

e360 SnowStorm / Smashing XmasLights 1.2.1 e360 SnowStorm / SmashingXmasLights

Forum Runner 4.2.2 Adds push notification for your users using Forum Runner on the iPhone/iPod/iPad. Also takes care of notifying users that your forum supports Forum Runner if they are viewing from a supported device.

Inactive User Reminder Emails 2.2.1 Sends emails out to inactive users encouraging them to re-visit the forum

Member Tracking 4.2.0.0 Track Member Visits

More Share Options TNG by BOP5 (Free Version) 3.2 Add more "Share" buttons to all forum pages.

Panjo 4.2.2 Classifieds integration that increases engagement, grows membership, and generates a new stream of revenue.

PostRelease 4.2.2 Official PostRelease plugin for vBulletin

Prevent Posting Of Links On User Group Per User Gr 1 It will allow you to enable and disable the ability to post links for user groups.

SEOforums.org Fuzzy SEO Booster 3 1.5.0b SEOforums.org Fuzzy SEO Booster 3

Separate Sticky and Normal Threads 1.1 Separate Sticky and Normal Threads

Skimlinks Plugin 4.2.2 Official Skimlinks plugin for vBulletin

Tapatalk 4.7.1 Tapatalk mobile app plugin for vb4.

Tapatalk - Who's Online 1.0.0 Shows the user as viewing the forum via Tapatalk rather than Unknown

UserCP Referral Link 0.1 Place a box in UserCP/Settings with a link for members to refer new people.

v3 Arcade 2.0.3 Professional vBulletin Gaming (vB4)

vBSEO :: Sitemap Generator 3.0 Generate a Google & Bing Sitemap for your Forums

vBulletin Blog 4.2.2 Personal web log, integrated with vBulletin.

vBulletin CMS 4.2.2 Content Management System

Word Links FREE by BOP5 VB4 2.0 Link words in posts, groups, visitor messages, and more to the URLs of your choice. (FREE VERSION)