How to view thermostats in Contractor portal

The Thermostats window in the Contractor portal has view buttons for thermostats, alerts, and reminders, but each of these buttons leads me to a blank screen (I do have thermostats registered, and the windows says I have both alerts and reminders). I am using a Firefox browser, and pressing the thermostats button takes me to which appears as a blank page. Is this a known problem, or am I doing something wrong?
Allen Downs
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