No notifications from Ring Doorbell 2 on Xiaomi 8

Hi, I just installed a Ring Doorbell 2 today, everything works perfect except the fact that I do not receive any notifications (written or sound). My phone is a Xiaomi Mi 8, MIUI version: MIUI 11.0.6, Android version 10, Android security patch level 2019-12-01, CPU: Snapdragon 845, Hardware version V1. In my Ring app, Ring Alerts, Record Motion and motion alerts are all ON. Also, I installed Hidden Settings for MIUI and all the Ring notifications are activated. What should I do, Thanks !