Unable to get contact past events

[pdimiel]

I am trying to get past events (i.e transfer events) from a deployed contract.

The autogenerated code is like this:

/// Returns a live stream of all Transfer events emitted by this contract.
  Stream<Transfer> transferEvents(
      {_i1.BlockNum? fromBlock, _i1.BlockNum? toBlock}) {
    final event = self.event('Transfer');
    final filter = _i1.FilterOptions.events(
        contract: self, event: event, fromBlock: fromBlock, toBlock: toBlock);
    return client.events(filter).map((_i1.FilterEvent result) {
      final decoded = event.decodeResults(result.topics!, result.data!);
      return Transfer(decoded);
    });
  }

and I am calling it using this:

final startBlock = BlockNum.genesis(); // also tried the valid BlockNum.exact(68);
final endBlock = BlockNum.currect(); // also tried the valid BlockNum.exact(68);
contract. transferEvents(fromBlock: startBlock, toBlock: endBlock).listen((event) {
      print(event.from);
      print(event.to);
      print(event.tokenId);
    });

which prints nothing and after a while throws the following:

Error: XMLHttpRequest error.
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 299:10  createErrorWithStack
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart 341:28            _throw
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/core/errors.dart 116:5                                           throwWithStackTrace
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/zone.dart 1378:11                                          callback
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/schedule_microtask.dart 40:11                              _microtaskLoop
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/async/schedule_microtask.dart 49:5                               _startMicrotaskLoop
C:/b/s/w/ir/cache/builder/src/out/host_debug/dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 166:15           <fn>