Same issue here =(

Also having this issue.

Edit to say I was finally able to get in!

I cannot enter too.

Same

Same

Same

This should be fixed but for those still having an issue: 

1. Steps to get around the Ezio Chase bug.
   Press "r"
2. Click the resource drop-down near the top right (between gems/and "X")
3. Click classic arena or tag arena token.
4. Do any fight
5. win/lose the fight
6. go back out to the bastion like normal.

On mobile:

1. Attempt to claim day 1
2. Click support when error screen pops up
3. Exit the support pop up
4. Claim daily log in
5. Close all the annoying pop up deals
   Or on mobile you can also activate airplane mode, attempt to claim the ezio thing, press continue, then disable airplane mode.