Bluetooth setup fails for Impress Remote app on Nexus 6 phone

I established a paired Bluetooth connection between HP Spectre x360 and Nexus 6 phone. In each device, the other devise is shown and is indicated as paired.

I set in LibreOffice: [tools ] [Options] [LibreOffice Impress] [general] [x]Enable remote control [OK].

Message on Impress Remote app: “Connection Failed”

LO v6.2.0.3

Never mind.
The error message said how to connect but didn’t say that I had to restart Impress.
I restarted Impress and now it works.