I'm receiving the following error when I try to trigger templates through WhatsApp Business API. I'm not able to send the WhatsApp templates since a week. Please let me know how to fix this issue. All the templates used to work perfectly and all of a sudden none of the templates are working.

"error": { "message": "(#135000) Generic user error", "type": "OAuthException", "code": 135000, "error_data": { "messaging_product": "whatsapp", "details": "Generic user error" }, "fbtrace_id": "ADy5-dsrTYHQhY_Z_hi7cIM" }