I tried following the instructions posted here: https://kb.promise.com/thread/tips-for-restoring-entire-mac-system-disk-from-apollo-time-machine-backup/

…but every time I put my credentials in (with "admin" as username, Apollo account password in password field), it appears to accept the input, but then nothing happens, and I'm returned to "Select a Restore Source".

Any help would be greatly appreciated.