Hello! I'm Grace Wilson, here to help you with the "invalid number" issue you're experiencing on the VERO app. Let's work through this together.

First, let's make sure of the following:

1. Number Format: Sometimes, the app may expect your phone number in a specific format. Try entering it with the country code at the beginning (e.g., +1 for the United States).

2. Correct Input: Double-check the number for any typographical errors. Even a small mistake can cause an "invalid number" error.

3. Supported Region: Ensure that your phone number is from a region supported by the VERO app.

4. App Updates: Make sure your VERO app is up-to-date. An outdated app might not recognize the latest number formats or regional codes.

5. Network Connection: Confirm that you have a stable internet connection. Sometimes, a weak connection can cause issues with verifying numbers.

Could you please try these steps and let me know if any of them help resolve the issue? If the problem persists, I'll be here to assist you further!