"CCCD Handle not found" error from characteristic.startNotifications()

Update : working now!

Reading the code from @Zakaton and @Gordon's response I added a characteristic.handle_cccd = 0x0038; statement.

      c.handle_cccd = 0x0038;
      return c.startNotifications();

Now the Notifications are coming through.

Device connected: A4:C1:38:4E:75:A0 public
Service: ebe0ccb0-7a0a-4b0c-8a1a-6ff2997da3a6
Characteristic: ebe0ccc1-7a0a-4b0c-8a1a-6ff2997da3a6
C: BluetoothRemoteGATTCharacteristic: {
  "uuid": "ebe0ccc1-7a0a-4b0c-8a1a-6ff2997da3a6",
  "handle_value": 54, "handle_decl": 53,
  "properties": { "broadcast": false, "read": true, "writeWithoutResponse": false, "write": false,
    "notify": true, "indicate": false, "authenticatedSignedWrites": false }
 }
Done!
temp: 2484  Hum: 53
temp: 2487  Hum: 53
temp: 2486  Hum: 53

Thanks for the inspiration.