i'm having a different issue than the one mentioned above.
for me, i do get the code sent to my email, but after entering it, the website is stuck refreshing
https://whale.io/?modal=verification with a blank page over and over and over.
I faced the same issue when I tried to log in for the first time on whale.io. I waited a few minutes for the casino home page to show up which took a few minutes while the home screen kept on refreshing. At last, I was able to see the home screen, I believe you wait for the screen or close the page and open it up again. It should work regardless of any browser that you are trying to access the casino. I faced this issue for the first time and after that it never came up with me.