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I really do not enjoy debugging pulumi :disappointed:
this is error says absolutely nothing
```    transformed: Input[U] = func(value)
    TypeError: sequence item 6: expected str instance, NoneType found
    error: an unhandled error occurred: Program exited with non-zero exit code: 1```

TypeError is a python stdlib error: <https://docs.python.org/3/library/exceptions.html#TypeError>

as far as I can tell, this is telling you something in your list isn't a string.

Yeah, the fun fact is that the object throwing this error receives many lists and expects a JSON so the error thrown is not really helpful.