[Python] "FailedPrecondition: 400 Precondition check failed" Error when Processing Document...

I'm working with the Google Cloud Document AI API to process PDF files. I'm encountering the following error when trying to use the process_document method:

google.api_core.exceptions.FailedPrecondition: 400 Precondition check failed.
​

I made sure that the PDF is not corrupted and the size is correct, I tried to make a retry for this but still the same Exception.

# Read the file into memory
with open(pdf_file_path, "rb") as image:
image_content = image.read()

# Load binary data
raw_document = documentai.RawDocument(
content=image_content,
mime_type="application/pdf",
)

# Configure the process request
request = documentai.ProcessRequest(name=processor_name, raw_document=raw_document)

result = client.process_document(request=request)
document = result.document
return document.text


Full Error:

File "/workspace/main.py", line 185, in docAI_ocr
result = client.process_document(request=request)
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/cloud/documentai_v1/services/document_processor_service/client.py", line 914, in process_document
response = rpc(
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/api_core/gapic_v1/method.py", line 131, in __call__
return wrapped_func(*args, **kwargs)
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/api_core/retry/retry_unary.py", line 293, in retry_wrapped_func
return retry_target(
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/api_core/retry/retry_unary.py", line 153, in retry_target
_retry_error_helper(
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/api_core/retry/retry_base.py", line 212, in _retry_error_helper
raise final_exc from source_exc
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/api_core/retry/retry_unary.py", line 144, in retry_target
result = target()
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/api_core/timeout.py", line 120, in func_with_timeout
return func(*args, **kwargs)
File "/layers/google.python.pip/pip/lib/python3.9/site-packages/google/api_core/grpc_helpers.py", line 78, in error_remapped_callable
raise exceptions.from_grpc_error(exc) from exc
google.api_core.exceptions.FailedPrecondition: 400 Precondition check failed.


Does anyone know how to solve this?

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