I click "convert" button (for example Bitcoin), the window "convert bitcoin ->" it opens, I select "CPS" button and I have this message:
Error
That coin cannot be converted to CPS! (At least not yet)
For every type of coins I receive that message, only when I select to convert in CPS (I've asked for this reason)
You have to convert from within your CoinPayments Wallet (the Your Wallets page when you log in), not the Supported Coins page.