I just exchanged my 2 TB HDD in my A1419 27" 5K late 2015 iMac to a 2 TB SSD (before that, it was part of a Fusion Drive configuration). Now I went into recovery mode on startup and tried restoring from that backup via network. The drive appeared as it should, and the backup, too, but every time I try to access it, it fails with error 112. I then tried to access the backups from another Mac in the network, and Time Machine nicely shows me all the backups and I can open up the last one and see all folders and files. So what's the problem here? I'm using a Synology NAS and usually connect it with SMB.
Here is your diskutil