Further Improvements to Catch Content Blocked in Iframe

Make sure debug is turned off (i.e. you are not seeing either "Continue to External Tool" or the JWT dump for LTI 1.3) Make sure you are on a server that is using https (i.e. not a local dev instance) Set up a tool configured properly for LTI 1.1 and LTI 1.3 - probably just use the https://sakai.tsugicloud.org - install one tool in lessons using Add Learning App.  Launch the tool and make sure it works in both LTI 1.1 and 1.3.  Then break the tool LTI 1.3 by editing it and changing "LTI 1.3 Tool OpenID Connect/Initialization Endpoint" and change https to http and save the tool.  Go into Lessons and attempt to add a Learning App.  If you watch the developer console, you will see the mixed content block happen - but in 5 seconds, Sakai will notice it and pop up an alert.  It can't be fixed- but Sakai now talks about it.  (screen shot) Also go and try to launch a tool you installed before you broke it - the same should happen.  It should fail but a message should come up.