BLE Connection with Arduino Nano 33 BLE - Help Needed

I am having trouble establishing a connection with the Arduino Nano 33 BLE using the BluetoothLE1 extension. Any help would be appreciated;
NOTE: The final goal is to send a phone number to the arduino, so that way the arduino can use that phone number to send a text to. The number must be sent in a string format.

BluetoothLE Extension Version: 20200828
Date Built: 2020-08-28

My Blocks:

My Arduino Code:

(Text Form):
#include <ArduinoBLE.h>
char character;

BLEService BadgeService("19B10000-E8F2-537E-4F6C-A104768A1214"); // BLE Badge Service
BLEByteCharacteristic switchCharacteristic("19B10001-E8F2-537E-4F6C-A104768A1214", BLERead | BLEWrite);
BLEStringCharacteristic nomCharacteristic("19B10002-E8F2-537E-4F6C-A104768A1214", BLEWrite,20);
BLEStringCharacteristic prenomCharacteristic("19B10003-E8F2-537E-4F6C-A104768A1214", BLEWrite,20);
BLEStringCharacteristic fonctionCharacteristic("19B10004-E8F2-537E-4F6C-A104768A1214", BLEWrite,20);
// put your setup code here, to run once:
void setup() {


void loop() {
// put your main code here, to run repeatedly:
if(Serial.available()) {;
} else {
Serial.println("No Serial.available()");

I have managed to connect (Though, inconsistently) and when I do so and click the send message I get this error:

Service 191b1000-e8f2-5375-4f6c-a104768a1214, characteristic 9b100001-e8f2-537e-4f6c-a104768a1214 are not published by the connected device.

Are you sure the UUIDs are correct? I cannot find the serviceuuid from your blocks in the arduino code.
Did you find the Arduino code you use somewhere?
Maybe there is a pre-built example that you can use?

The UUIDs look OK to me. Can you try increasing the connection time-out Thomas?

In your App, this Block is wrong:

You should populate your List when the scanning for devices has stopped.

Use a List After Picking Block to connect BLE: