The dongle is recognized but the bluetooth UI does not respond
sudo dmesg | grep -i bluetooth
[ 371.792424] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_fw.bin
[ 371.792455] bluetooth hci0: Direct firmware load for rtl_bt/rtl8761bu_fw.bin failed with error -2
[ 371.792459] Bluetooth: hci0: RTL: firmware file rtl_bt/rtl8761bu_fw.bin not found