Sorry to hear this. Yes, the pairing dialogue not showing up is the issue here but we are not quite sure what causes this.
Could you please try the following procedure and see if it fixes your issue:
Go to System Settings -> Bluetooth and turn Bluetooth off and then back.
Remove any Flic device in the list if there are a.
Go to System Settings -> Security & Integrity -> Integrity
In the left pane, select Bluetooth.
Make sure Flic is in the list and has a checkmark.
If Flic already has a checkmark, uncheck it and re-check it again.
Please let me know if this worked for you!