The code of the SAC algorithm does not work

[CelikAbdullah]

Hello,
when I execute the code of the SAC algorithm, I get the following error message:

/usr/local/lib/python3.10/dist-packages/gym/core.py:317: DeprecationWarning: WARN: Initializing wrapper in old step API which returns one bool instead of two. It is recommended to set `new_step_api=True` to use new step API. This will be the default behaviour in future.
  deprecation(
/usr/local/lib/python3.10/dist-packages/gym/wrappers/step_api_compatibility.py:39: DeprecationWarning: WARN: Initializing environment in old step API which returns one bool instead of two. It is recommended to set `new_step_api=True` to use new step API. This will be the default behaviour in future.
  deprecation(
/usr/local/lib/python3.10/dist-packages/gym/utils/passive_env_checker.py:174: UserWarning: WARN: Future gym versions will require that `Env.reset` can be passed a `seed` instead of using `Env.seed` for resetting the environment random number generator.
  logger.warn(
/usr/local/lib/python3.10/dist-packages/gym/utils/passive_env_checker.py:190: UserWarning: WARN: Future gym versions will require that `Env.reset` can be passed `return_info` to return information from the environment resetting.
  logger.warn(
/usr/local/lib/python3.10/dist-packages/gym/utils/passive_env_checker.py:195: UserWarning: WARN: Future gym versions will require that `Env.reset` can be passed `options` to allow the environment initialisation to be passed additional information.
  logger.warn(
/usr/local/lib/python3.10/dist-packages/gym/utils/passive_env_checker.py:227: DeprecationWarning: WARN: Core environment is written in old step API which returns one bool instead of two. It is recommended to rewrite the environment with new step API. 
  logger.deprecation(
<ipython-input-11-34a0d7821828>:106: UserWarning: Anomaly Detection has been enabled. This mode will increase the runtime and should only be enabled for debugging.
  with torch.autograd.detect_anomaly():
/usr/local/lib/python3.10/dist-packages/torch/autograd/__init__.py:200: UserWarning: Error detected in AddmmBackward0. Traceback of forward call that caused the error:
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/usr/local/lib/python3.10/dist-packages/ipykernel_launcher.py", line 16, in <module>
    app.launch_new_instance()
  File "/usr/local/lib/python3.10/dist-packages/traitlets/config/application.py", line 992, in launch_instance
    app.start()
  File "/usr/local/lib/python3.10/dist-packages/ipykernel/kernelapp.py", line 619, in start
    self.io_loop.start()
  File "/usr/local/lib/python3.10/dist-packages/tornado/platform/asyncio.py", line 195, in start
    self.asyncio_loop.run_forever()
  File "/usr/lib/python3.10/asyncio/base_events.py", line 603, in run_forever
    self._run_once()
  File "/usr/lib/python3.10/asyncio/base_events.py", line 1909, in _run_once
    handle._run()
  File "/usr/lib/python3.10/asyncio/events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "/usr/local/lib/python3.10/dist-packages/tornado/ioloop.py", line 685, in <lambda>
    lambda f: self._run_callback(functools.partial(callback, future))
  File "/usr/local/lib/python3.10/dist-packages/tornado/ioloop.py", line 738, in _run_callback
    ret = callback()
  File "/usr/local/lib/python3.10/dist-packages/tornado/gen.py", line 825, in inner
    self.ctx_run(self.run)
  File "/usr/local/lib/python3.10/dist-packages/tornado/gen.py", line 786, in run
    yielded = self.gen.send(value)
  File "/usr/local/lib/python3.10/dist-packages/ipykernel/kernelbase.py", line 361, in process_one
    yield gen.maybe_future(dispatch(*args))
  File "/usr/local/lib/python3.10/dist-packages/tornado/gen.py", line 234, in wrapper
    yielded = ctx_run(next, result)
  File "/usr/local/lib/python3.10/dist-packages/ipykernel/kernelbase.py", line 261, in dispatch_shell
    yield gen.maybe_future(handler(stream, idents, msg))
  File "/usr/local/lib/python3.10/dist-packages/tornado/gen.py", line 234, in wrapper
    yielded = ctx_run(next, result)
  File "/usr/local/lib/python3.10/dist-packages/ipykernel/kernelbase.py", line 539, in execute_request
    self.do_execute(
  File "/usr/local/lib/python3.10/dist-packages/tornado/gen.py", line 234, in wrapper
    yielded = ctx_run(next, result)
  File "/usr/local/lib/python3.10/dist-packages/ipykernel/ipkernel.py", line 302, in do_execute
    res = shell.run_cell(code, store_history=store_history, silent=silent)
  File "/usr/local/lib/python3.10/dist-packages/ipykernel/zmqshell.py", line 539, in run_cell
    return super(ZMQInteractiveShell, self).run_cell(*args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/IPython/core/interactiveshell.py", line 2975, in run_cell
    result = self._run_cell(
  File "/usr/local/lib/python3.10/dist-packages/IPython/core/interactiveshell.py", line 3030, in _run_cell
    return runner(coro)
  File "/usr/local/lib/python3.10/dist-packages/IPython/core/async_helpers.py", line 78, in _pseudo_sync_runner
    coro.send(None)
  File "/usr/local/lib/python3.10/dist-packages/IPython/core/interactiveshell.py", line 3257, in run_cell_async
    has_raised = await self.run_ast_nodes(code_ast.body, cell_name,
  File "/usr/local/lib/python3.10/dist-packages/IPython/core/interactiveshell.py", line 3473, in run_ast_nodes
    if (await self.run_code(code, result,  async_=asy)):
  File "/usr/local/lib/python3.10/dist-packages/IPython/core/interactiveshell.py", line 3553, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-12-ebd8c3a16d78>", line 72, in <cell line: 72>
    sac_agent.train()
  File "<ipython-input-11-34a0d7821828>", line 180, in train
    self.optimize(experiences)
  File "<ipython-input-11-34a0d7821828>", line 129, in optimize
    current_q_vals_b = self.online_value_model_b(states, current_actions)
  File "/usr/local/lib/python3.10/dist-packages/torch/nn/modules/module.py", line 1501, in _call_impl
    return forward_call(*args, **kwargs)
  File "<ipython-input-8-c490369f540d>", line 54, in forward
    x = self.output_layer(x)
  File "/usr/local/lib/python3.10/dist-packages/torch/nn/modules/module.py", line 1501, in _call_impl
    return forward_call(*args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/torch/nn/modules/linear.py", line 114, in forward
    return F.linear(input, self.weight, self.bias)
 (Triggered internally at ../torch/csrc/autograd/python_anomaly_mode.cpp:114.)
  Variable._execution_engine.run_backward(  # Calls into the C++ engine to run the backward pass
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
[<ipython-input-12-ebd8c3a16d78>](https://localhost:8080/#) in <cell line: 72>()
     70 
     71 # start training
---> 72 sac_agent.train()

3 frames
[/usr/local/lib/python3.10/dist-packages/torch/autograd/__init__.py](https://localhost:8080/#) in backward(tensors, grad_tensors, retain_graph, create_graph, grad_variables, inputs)
    198     # some Python versions print out the first line of a multi-line function
    199     # calls in the traceback and some print out the last line
--> 200     Variable._execution_engine.run_backward(  # Calls into the C++ engine to run the backward pass
    201         tensors, grad_tensors_, retain_graph, create_graph, inputs,
    202         allow_unreachable=True, accumulate_grad=True)  # Calls into the C++ engine to run the backward pass

RuntimeError: one of the variables needed for gradient computation has been modified by an inplace operation: [torch.FloatTensor [256, 1]], which is output 0 of AsStridedBackward0, is at version 2; expected version 1 instead. Hint: the backtrace further above shows the operation that failed to compute its gradient. The variable in question was changed in there or anywhere later. Good luck!

Is there any error in the code ? Can somebody provide a solution for this ?