runtime error

File "/home/user/.local/lib/python3.10/site-packages/tensorflow/python/client/session.py", line 1215, in _run results = self._do_run(handle, final_targets, final_fetches, File "/home/user/.local/lib/python3.10/site-packages/tensorflow/python/client/session.py", line 1395, in _do_run return self._do_call(_run_fn, feeds, fetches, targets, options, File "/home/user/.local/lib/python3.10/site-packages/tensorflow/python/client/session.py", line 1421, in _do_call raise type(e)(node_def, op, message) # pylint: disable=no-value-for-parameter tensorflow.python.framework.errors_impl.InvalidArgumentError: Graph execution error: Detected at node 'fixed_y' defined at (most recent call last): File "/home/user/app/app.py", line 18, in <module> File "/home/user/app/SymbolicFunctionLearner.py", line 385, in __init__ File "/home/user/app/SymbolicFunctionLearner.py", line 556, in reset File "/home/user/app/SymbolicFunctionLearner.py", line 393, in build_sfl Node: 'fixed_y' You must feed a value for placeholder tensor 'fixed_y' with dtype float and shape [?,1,1] [[{{node fixed_y}}]] Original stack trace for 'fixed_y': File "/home/user/app/app.py", line 18, in <module> File "/home/user/app/SymbolicFunctionLearner.py", line 385, in __init__ File "/home/user/app/SymbolicFunctionLearner.py", line 556, in reset File "/home/user/app/SymbolicFunctionLearner.py", line 393, in build_sfl File "/home/user/.local/lib/python3.10/site-packages/tensorflow/python/ops/array_ops.py", line 3274, in placeholder File "/home/user/.local/lib/python3.10/site-packages/tensorflow/python/ops/gen_array_ops.py", line 7073, in placeholder File "/home/user/.local/lib/python3.10/site-packages/tensorflow/python/framework/op_def_library.py", line 796, in _apply_op_helper File "/home/user/.local/lib/python3.10/site-packages/tensorflow/python/framework/ops.py", line 2652, in _create_op_internal File "/home/user/.local/lib/python3.10/site-packages/tensorflow/python/framework/ops.py", line 1160, in from_node_def

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