Hello, I had a similar message : impossible to install Sonoma on my SSD (It work correctly with Ventura) I erase my SSD without results so I put a new SSD and it was possible to install Sonoma. My old SSD work always like an external SSD.
I actually purchased a brand new SSD, SanDisk 2TB SSD, but no luck. It seems not to be able to connect to wifi even though I have an ethernet cable plugged in. Very strange. Not sure what else I can do here...