Bluetooth saying when trying to connect to my M720 Triathlon "The setup of M720 Triathlon has failed"

I installed manjaro today and I can’t connect my mouse (M720 Triathlon). How would I fix this?
I’m running KDE Plasma Version: 5.21.5
Frameworks: 5.82.0
The Bluetooth card/ device: Realtek (I think the product ID is 0xc123)