If anyone else is having problems retrieving wallet balance, since blockchain.info started refusing requests from old IE versions, here's the solution. In settings, don't use "Addresses" field. Retrieve your address balance through "Pool #1":
Poll #1 URL: https://chain.api.btc.com/v3/address/YOUR_BTC_ADDRESS
Paid amount JSON key: json.data.balance/100000000

Also, if by any chance Bitstamp which is the default doesn't work for retrieving exchange rate, you can use Binance as primary exchange:
Primary exchange: https://api.binance.com/api/v3/ticker?symbol=BTCUSDT
Exchange rate JSON key: lastPrice