"It looks like your content might not load." error for content that DOES load

Community Member


I am getting the error in-page on Canvas for my LTI 1.3 tool upon launch: "It looks like your content might not load. You can use this button to try launching it in a new tab." Followed by the message "This tool needs to be loaded in a new browser window" and the button with text "Load LTI 1.3 LAUNCH in a new window"

However, the test tool does in fact render in-page. I am currently just playing with sandboxes first to get the LTI 1.3 handshake going so this is not a full blown web app yet. Is there something that my web app needs to communicate within the iframe to not generate this error for the user? Or something else I need to do in the integration setup?