Opentofu 1.7.3 and aws provider 5.59.0 state file error

[ReXtrem]

aws-security-group-diagram-from-terraform % python3 main.py -f dev.json         
Warning: format_version 'None' is not tested. Tested: ['1.0']
Traceback (most recent call last):
  File "/Users/gfuchs/Projects/OpenSource/aws-security-group-diagram-from-terraform/schema_terraform_state_file.py", line 16, in check_state_file_against_schema
    state_file_dict_schema.validate(data)
  File "/Users/gfuchs/Library/Python/3.12/lib/python/site-packages/schema.py", line 508, in validate
    raise SchemaMissingKeyError(message, e.format(data) if e else None)
schema.SchemaMissingKeyError: Missing keys: 'format_version', 'values'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/gfuchs/Projects/OpenSource/aws-security-group-diagram-from-terraform/main.py", line 51, in <module>
    preprocessed_json = process_json(input_json)
                        ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/gfuchs/Projects/OpenSource/aws-security-group-diagram-from-terraform/convert_state_file_to_diagram_generator_input.py", line 15, in process_json
    check_state_file_against_schema(data)
  File "/Users/gfuchs/Projects/OpenSource/aws-security-group-diagram-from-terraform/schema_terraform_state_file.py", line 18, in check_state_file_against_schema
    raise Exception("State File Validation failed!", e)
Exception: ('State File Validation failed!', SchemaMissingKeyError("Missing keys: 'format_version', 'values'"))