I want to tie my openID login to my b2evolution profile
when i click the link : Link a new OpenID to this profile...

i get the folowing blank page error :

Add an OpenID to your user profile

This form allows you to add an OpenID to your profile.

Fatal error: Call to a member function get_template() on a non-object in /blog/inc/_core/ui/forms/_form.class.php on line 189

on my browser (FF) the URL displayed looks like this :
blog/htsrv/call_plugin.php?plugin_ID=69&method=add_openid

I hope it can help..any idea what's the problem here ?