I did check your site and couldn’t figure anything out just by looking at the frontend.
I do understand that your site is a hidden service. It’s true I did not setup an onion site. The issue here is not how the browser connects to your site, but how your site connects to the other APIs. Just because your site exposes an onion service does not mean it itself uses tor to connect to the other APIs. Your block.io adapter connects to the block.io API over clearnet probably, not Tor. The block.io adapter does not know anything about proxies. Only the CoinPayments adapter connects to its API over tor. I have tested this on my end.
Can you tell me when you go to Wallets -> CoinPayments -> Coin Options, do you see your coins listed?