I am also having the same problem. This is one of my two accounts, both of which I have changed my payout time on, but this account had issues with the payout change and the other did not.
Ally code: 948-179-862
I had the same error with 888 times to claim.
When I clicked on the different daily rewards the message doesn't show anymore, but the reward didn't came either.
I'm also experiencing this issue.
Yesterday (12/30/2018 8 AM EST) when I logged into my SWGOH game there was only 1 reward left in my December login Rewards, the 1 Zeta, which I claimed. This morning, (12/31/2018 9 AM EST) when I login it shows me the December Login Rewards but there isn’t a reward to claim as they all show as claimed. The button to claim says “Login 888 times to claim” and the “TItle Text” area says “Text goes here”. While I can tap the red circle X button in the top-right to close the December Login Rewards, later as I’m moving within the game it will come back up again like I have not claimed the reward for the day and still shows that all of the rewards have been claimed. I’m not sure why this is happening. My only theory is that this has to do with me changing my Time Settings so that my Daily Activities Reset changed from 12:00 AM to 4:00 AM.
Ally Code: 191155833
Case Number: 45771832
Same issues as reported, changed my payout a few days ago and can’t claim log in rewards. Screen shots shown by players with the button to click after 888 log in is the same.