I'm trying to integrate our learning app with the LTI Advantage Deep Linking service in Schoology. When trying to post the form for the DeepLinkingResponse JWT after going through Course Material Selection, we receive the following error:
{"error":"handleDeepLinkingLaunchInfo.error: Invalid signature validator."}
And no material is created. This error only happens with our production environment. When using our app on localhost it works fine and I'm able to successfully create working Materials in Schoology via Deep Linking.
Does anyone know what this error means? Or even better, does someone know how to get in contact with the developers who know about the LTI 1.3 integration?
