Yep. This is happening to me and a friend of mine. Both of us have checked in and missed out either every other day or a couple days in a row.
Failed to Get Daily Check-in
I got my daily login gift today, is it back to normal?
No the error from what I see comes from claiming daily manually from earn rewards instead of the pop up that comes up sometimes when you log in.
- Edited
Shiore I didn't get anything when claiming it from the pop up until today.
Difference in device? Or app? I'm using a phone, and the browser version of Webnovel.
SageDrunkKitty I’m using the app on iOS I was able to get it today when it popped up.
Again... I didn’t get my daily check in reward 
... Webnovel plzz correct this issue immediately....