When using ssidPrefix in the descriptor and completing the AccessorySetupKit setup, I attempt to connect to the accessory's Wi-Fi hotspot using NEHotspotConfigurationManager joinAccessoryHotspot.
The connection fails with the following error:
Error Domain=NEHotspotConfigurationErrorDomain Code=1 "invalid SSID." UserInfo={NSLocalizedDescription=invalid SSID.}
I'm using a prefix that is at least 3 characters.
If I provide ssid instead of ssidPrefix it connects successfully.