"Unknown error occured" while pairing

Hello, I am new to Homey trying to use the Homey Pro 2019 version. I need to pair the hub with couple IKEA Parasoll sensors and with Danfoss Ally radiator valves. I downloaded the applications which are showing that they support the devices. Homey finds the device in the pairing mode and starts pairing but always fails with “Unknown error occured”. Does anyone know how to fix this?