I uninstalled V6.12, installed V5.106, same situation: can’t get past 20% connect, can’t reset the PIN (the device doesn’t respond with all 3 LEDs flashing) and it fails.
I re-upgraded to V6.12 and suddenly I was able to reset the PIN. Now I can attempt to connect, it gets to 80% and asks for the PIN for pairing, but entering it (“000000”) causes a loop, the connection attempt restarts from 0% and ask for the PIN again. Same behaviour as described here: Victron Connect Pairing Issue (Android 15)
If I try to pair directly from Android, the 3 LEDs flash together 5-8 times on the device and stop. It is not long enough to enter the PIN and pairing fails too.