IStrategyWithEntryOrderBlocking

Traceback (most recent call last):
  File "/freqtrade/freqtrade/main.py", line 42, in main
    return_code = args['func'](args)
                  ^^^^^^^^^^^^^^^^^^
  File "/freqtrade/freqtrade/commands/optimize_commands.py", line 57, in start_backtesting
    backtesting = Backtesting(config)
                  ^^^^^^^^^^^^^^^^^^^
  File "/freqtrade/freqtrade/optimize/backtesting.py", line 113, in __init__
    self.strategylist.append(StrategyResolver.load_strategy(self.config))
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/freqtrade/freqtrade/resolvers/strategy_resolver.py", line 48, in load_strategy
    strategy: IStrategy = StrategyResolver._load_strategy(
                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/freqtrade/freqtrade/resolvers/strategy_resolver.py", line 269, in _load_strategy
    strategy = StrategyResolver._load_object(
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/freqtrade/freqtrade/resolvers/iresolver.py", line 156, in _load_object
    return module(**kwargs)
           ^^^^^^^^^^^^^^^^
TypeError: Can't instantiate abstract class IStrategyWithEntryOrderBlocking with abstract method populate_indicators