Error Connecting Whatsapp Number (Copilot Studio to Azure ACS)

Please help.

I created an AI Agent in Copilot Studio for connecting to WhatsApp. I created an Azure Communication Services (ACS) and connected my personal Facebook page to it. I created a WhatsApp Business number, I got the code, and it connected. However, when I return to Copilot studio to connect using my Azure Subscription and Resource,  it says- Error connecting to WhatsApp phone number. Please try again.

How do I resolve this?