Forum LAMS for Tech-Heads - General Forum: Re: Invalid direct reference to form login page

Another reason you might be getting a 400 error is if your browser is blocking 3rd party cookies. In this case LAMS is the 3rd party cookie when you're using it via Blackboard/Moodle.

In Firefox, blocking 3rd party cookies isn't enabled by default (you have to actively check the box 'for the originating site only' in the cookies options), but the default setting in IE blocks some, so try changing the setting or specifically allow your LAMS server's cookies through by adding it's domain to the list of allowable cookies and see if you still have the problem.

Posted by Jun-Dir Liew