I have two moodles setup (moodle32 and moodle33); moodle32 is the LTI provider and moodle33 is the consumer.
On the provider, the cartridge URL is: http://moodle32.lms.xxxxxx/enrol/lti/cartridge.php/3/713f367107aa5d5f72d3fa2aeaf6e5e7/cartridge.xml
On the consumer, that has been added to a course as an "Add external tool" activity
I've added the cartridge URL and secret, and the tool URL is now showing as http://moodle32.lms.xxxxxx/enrol/lti/tool.php?id=3
However, when I click on "save and display", I get the correct IFRAME and activity title, but the IFRAME content is "A required parameter (oauth_consumer_key) was missing"
Where and how is the consumer key defined on the provider moodle?