I want to use my free-spin, the only problem the game not react anything only blank and some people said the pair bet effect some game slot.
Maybe anyone know, should I deposit first.
No, You don't have to deposit. As Dimon already said, Change your currency to BTC as default. Click on Wallet and Choose BTC. Not only you but everyone has the same issue. Some providers' game doesn't open anymore with altcoins. I used to play games from the Provider BGaming. I Played with LTC a few weeks ago. It was working fine. But, After the latest update, I can play with BTC only.
I believe it should be a temporary thing, I get that providers may not want to accept certain coins and thats understandable. However, not wanting anything to do with all of this at all doesn't really make sense to me at all.
It must be something decent and we should all be focusing on a decent return, probably going to end up with like 4-5 decent coins on all providers, and some providers will accept even more but thats about it, I do not think that it is going to be "just btc, nothing else" for a long time because that will create a competition difference, anyone who offers more will end up getting all the customers and leave others to dust.