Per a separate topic, it seems that you need to use SSL URLs to see any material icons in a Perpsective project, using Chrome browser. So if devices are forced to redirect to the secure URL, or you type in the https url into at least Chrome and Safari on IOS, it never authenticates and starts the Perspective client. I suspect it is because the cert is self-signed, but there does not seem to be a way to get around it, aside I assume of buying a real SSL certificate.
FYI this is also true of the Mobile App on Android- it will not connect with a self-signed cert either. We have been able to get it to start in Chrome on an Android device by clearing cookies first.