Google SEO plugin causing invalid forum

[gstek]

I am now having exact same issue and it came up only after changing the server.
I tried all methods suggested in this forum like rebuilding the cache, re uploading forumdisplay
looking into Htaccess, making sure google seo URL parameters is not clashing with anything.
etc etc. Not even this forum but searched all over net but nothing seems to be working for me :/

Problem came only after moving host ( control panel is still same DA )

Link : http://xscams.com

P.S. ATM plugin is disabled to show up the threads but I get this error when I activate the plugin
and it is only and only at THREAD

http://pasteboard.co/PiNQjTA.png

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This is my Htacess file like:

RewriteEngine on

# Some hosts require RewriteBase to make RewriteRules work.
RewriteBase /

# Google SEO workaround for search.php highlights:
# Make this rule the first rewrite rule in your .htaccess!
RewriteRule ^([^&]*)&(.*)$ http://xscams.com/$1?$2 [L,QSA,R=301]

# Google SEO URL Users:
RewriteRule ^User-([^./]+)$ member.php?action=profile&google_seo_user=$1 [L,QSA,NC]

# Google SEO 404:
ErrorDocument 404 /misc.php?google_seo_error=404

# Google SEO URL Forums:
RewriteRule ^([^./]+)$ forumdisplay.php?google_seo_forum=$1 [L,QSA,NC]

# Google SEO Sitemap:
RewriteRule ^sitemap-([^./]+)\.xml$ misc.php?google_seo_sitemap=$1 [L,QSA,NC]

# Google SEO URL Threads:
RewriteRule ^Thread-([^./]+)$ showthread.php?google_seo_thread=$1 [L,QSA,NC]

# Google SEO URL Announcements:
RewriteRule ^Announcement-([^./]+)$ announcements.php?google_seo_announcement=$1 [L,QSA,NC]

# Google SEO URL Calendars:
RewriteRule ^Calendar-([^./]+)$ calendar.php?google_seo_calendar=$1 [L,QSA,NC]

# Google SEO URL Events:
RewriteRule ^Event-([^./]+)$ calendar.php?action=event&google_seo_event=$1 [L,QSA,NC]

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Any solution to this issue above??