Question about the Tesla Solar Energy app

[Carbonfiber]

Finally got my solar panels up and running yesterday morning. Today I noticed the kw output went blank and was wondering what that means? This happened at about 3:30pm.

 

[SoCalSolarRoof]

Mine app is pretty buggy, often to get instantaneous output readings I have to switch to yesterday's readings and then back to today. Then it pops back. Sometimes I have to restart the app to get readings...