Hello everyone. I'm telling you that we are using a Facebook Developers app to use WhatsApp services. The problem I have is that when I add a number from the App, I verify it and the WhatsApp account is created on Facebook Business with that phone number, it tells me that the phone number is pending verification, but when I try to download the certificate it doesn't show it to me.

It should be noted that the only profile on WhatsApp Business is mine and it has all the permissions for total control of both the App and the WhatsApp account.

I have done this process many times and this is the first time this has happened. Can you help me please.