My Whatsapp has stopped working (blacked out live tile). Is anyone else experiencing this issue?

[spinzeroWL]

The app was installed yesterday, and had been working fine. The same error occurred on my previous 1020 too...though I just put that down to my phone having not been reset in 8 months.
This is a freshly installed 1020 with all updates installed. I am on Developer Preview, so I'm hoping that is not the cause.
But yes, is anyone else having Whatsapp problems?

 

[aadicoool]

Same here. Live tile is greyed out and nothing happening if i try to open it from the app list.

P.S. i had reset my device (lumia 928) yesterday itself and whatsapp was working for me till nearly an hour back.
P.P.S. i am somehow on lumia denim update on the 928 with developer preview since yesterday after i did the reset.

 

[Ricardo Dawkins]

This issue is happening on my Lumia 822 right now. Did somebody try to reinstall the app ?