Hello McMagnus and andyrblank. Welcome to the Folding Support Forum.
If the phone has met the minimum requirements to fold, connected to the charger, 100% charge, and a WiFi connection, then there isn't much more we can do in this forum.
This Android client was designed by, and is supported by Sony. Please see the links in this forum post about where to get news and support for this client. https://foldingforum.org/viewtopic.php?f=100&t=27715
See also the Developer contact links at the bottom of the Google Play - Folding client page where the client was downloaded: https://play.google.com/store/apps/details?id=com.sonymobile.androidapp.gridcomputing&hl=en