What I suggest first is to do a search in your templates for:
HTML Code:
{vb:raw userinfo.securitytoken}
And change any instances you find to:
HTML Code:
{vb:raw bbuserinfo.securitytoken}
(Make a note of all templates changed in case you need to revert).
Then, check the links in your "Navigation Manager" for instances of:
Code:
{userinfo.securitytoken}
and change those to:
Code:
{bbuserinfo.securitytoken}