Cannot decrypt messages

[MonacledMonkey]

Robovac 30C Max. I previously had a working integration that was manually configured but when facing the deprecated StateVacummEntity issue tried to migrate over. Receiving theerrors:

Failed to decrypt message from (192.168.86.92:6668)
Failed to decrypt message from (192.168.86.91:6668)

'utf-8' codec can't decode byte 0x95 in position 10: invalid start byte
'utf-8' codec can't decode byte 0xe4 in position 0: invalid continuation byte
'utf-8' codec can't decode byte 0xe6 in position 4: invalid continuation byte
'utf-8' codec can't decode byte 0x96 in position 10: invalid start byte
'utf-8' codec can't decode byte 0x97 in position 10: invalid start byte

I tried the solution here: #15 but this made no difference.

Any ideas where to start with sorting this greatly appreciated.

[rustymyers]

I have similar messages

'utf-8' codec can't decode byte 0xa2 in position 2: invalid start byte
'utf-8' codec can't decode byte 0xc1 in position 15: invalid start byte
'utf-8' codec can't decode byte 0xa2 in position 15: invalid start byte
'utf-8' codec can't decode byte 0xc4 in position 9: invalid continuation byte
'utf-8' codec can't decode byte 0xc5 in position 9: invalid continuation byte

Not sure why. Looking into it as I can.