我在此问题上苦苦挣扎了两天，发现实时数据库无法在指定的WIFI(即我办公室的WIFI)上运行.它可以处理移动数据，甚至可以处理来自其他移动电话的热点信号.我终于通过重新启动办公室中的WIFI路由器解决了这个问题，但无法找出背后的原因.

I was struggling with this issue for two days and found the real-time database just cannot work on the specified WIFI, that was my office's WIFI. It can work on the mobile data and even the hotspot signal from other mobile phones. I finally resolved it by restarting the WIFI router in our office, but cannot figure out the behind reason.