Subgraph is not working.

https://thegraph.com/hosted-service/subgraph/learnforcode/quick-swap


Query: 
```
{
  uniswapFactories(first: 5) {
    id
    pairCount
    totalVolumeUSD
    totalVolumeETH
  }
  tokens(first: 5) {
    id
    symbol
    name
    decimals
  }
}
```
Result:
```
{
  "errors": [
    {
      "message": "indexing_error"
    }
  ]
}
```