When you twist items from the Poke Stop, you may see the error “Try Again Later”. It is a bug in Pokemon Go that forget to refresh to Poke Stop, no matter how many times you twist again, it will appear the same error, actually the items already grabbed into your bag.
Solution for Try Again Later Error Bug
The solution is kill the app, either in Android or Apple iOS, then reload the game again, you can see the Poke Stop was changed to Pink Color, it mean you have twisted the Poke Stop.
Many users have been reported it, and we think it will be fixed in the next version of update.
This bug found in Pokemon Go 1.3.1 for iOS and Android.