My Lumia 640 is not connecting to the Microsoft Account, or downloading/updating apps from the Store when it is connected to the Wi-Fi. It works fine on Mobile Data connection. However, all my other devices, such as two PCs, some android phones are working completely fine. I have checked my date/time and even reset it. I have reset my phone twice, and even changed the language and region to that of US together. But still no help. I have checked the settings of my router, and confirmed that there was no blocking feature enabled on it. But still, from yesterday, my phone is behaving strangely. Please help!
Update 1: All the above problem occurs only when the phone is connected to Wi-Fi. My phone works fine on Mobile Data. Please help.