runtime error

Traceback (most recent call last): File "/home/user/app/app.py", line 28, in <module> prompt_template = PromptTemplate() File "/home/user/.local/lib/python3.10/site-packages/langchain_core/load/serializable.py", line 97, in __init__ super().__init__(**kwargs) File "/home/user/.local/lib/python3.10/site-packages/pydantic/v1/main.py", line 339, in __init__ values, fields_set, validation_error = validate_model(__pydantic_self__.__class__, data) File "/home/user/.local/lib/python3.10/site-packages/pydantic/v1/main.py", line 1102, in validate_model values = validator(cls_, values) File "/home/user/.local/lib/python3.10/site-packages/langchain_core/prompts/base.py", line 89, in validate_variable_names if "stop" in values["input_variables"]: KeyError: 'input_variables'

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