ERROR: can't be converted into BI

[ShookLyngs]

Query:

query GetRgbppAddressBalances($address: String!) {
  rgbppAddress(address: $address) {
    balances {
      symbol
      amount
      decimal
      typeHash
    }
  }
}

Params:

address: bc1q8cey8mj52wuu6k52sd0cven8eyuwszh0eexn97

Error:

Error: invalid type:  can't be converted into BI: {"response":{"data":{"rgbppAddress":null},"errors":[{"message":"invalid type:  can't be converted into BI","locations":[{"line":3,"column":5}],"path":["rgbppAddress","balances"],"extensions":{"code":"INTERNAL_SERVER_ERROR"}}],"status":200,"headers":{}},"request":{"query":"query GetRgbppAddressBalances($address: String!) {\n  rgbppAddress(address: $address) {\n    balances {\n      symbol\n      amount\n      decimal\n      typeHash\n    }\n  }\n}","variables":{"address":"bc1q8cey8mj52wuu6k52sd0cven8eyuwszh0eexn97"}}}