Hi @kemensl ,
We had a similar issue and found that the new version of Safari was the culprit. A recent update in Safari 13.1 blocks third party cookie sharing, so Canvas cannot pass login information to other sites. When students updated their security settings and turned off "Prevent cross-site tracking" the issue was resolved. We use Panopto, and they have great step-by-step documentation for enabling cookies in each browser here: Panopto Support.