Users that gets the error: "Invalid Parameters" ,
We can't seem to reproduce the error.
Could you give us some more information about these specifics please:
Browser Used:
Mobile Phone Used?:
Bet amount tried to place:
Bet Currency:
Dice Selected:
If you could, send us an email through the support page, or reply to this post, we could take a closer look.
Also got this error last night, I used chrome browser on Desktop, bet amount 10 satoshi both with eth. when you read post above, you will see same problem with phone, look like your server problem.