Pairing on linux

Hi, I’m trying to connect to muse from linux Fedora 30. System is 64 bit but I have downloaded 32 bit libbluetooth.so.3.
System sees and connects to Muse, but the device remains unpaired.
using bluetoothctl I get:
[Muse-56BF]# pair
Attempting to pair with 00:55:DA:B7:56:BF
Failed to pair: org.bluez.Error.AuthenticationFailed
[CHG] Device 00:55:DA:B7:56:BF ServicesResolved: no
[CHG] Device 00:55:DA:B7:56:BF Connected: no

do you know what to do?
Cheers,
Mariusz