Hi Jeffrey,
Got it! I am assuming that is a message ASU has put into their own Canvas instance (as I have not seen it come into mine).
From what I can ascertain, it sounds like ASU may be using adding with Canvas that require locally downloaded tools such as proctoring tools, stats calculators and publisher tools. There are many of these available on the market, and it sounds like they may have had some pre-warning that those add-on tools (outside of base Canvas) may have issues that the respective vendors are working to resolve.
Given that advice, you may want to hold off, you would need to touch base with ASU support to ascertain at what point you can upgrade to Catalina and which vendor tools are affected (outside of Instructure's Canvas application).
Hopefully that helps!
Stuart
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